JP2000116700A - Underpants-type throwaway diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underpants-type throwaway diaper that can be disposed of in a folded and unspreadably fixed state. SOLUTION: In the underpants-type throwaway diaper 1, an auxiliary tape 8 is attached to the surface of a reverse sheet 7 of a diaper, and the auxiliary tape 8 has a central area and two end areas, the central area is adhered and fixed to the reverse sheet 7 and form a fixing portion, the two end areas are folded back onto the fixed portion and superposed thereon, adhesive layers are formed on the mutually facing portions of the two superposed end areas, and joined separably through a separately provided release agent layer. To dispose of it, the auxiliary tape 8 is run around the rounded diaper, and the adhesive layers of the end areas are joined and fixed together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a pants-type disposable diaper to be provided as a diaper for infants or incontinent persons, and more particularly, to disposal of contaminated pants-type disposable diapers after use. Auxiliary tape (also called disposal tape) that is a compact and pants-type disposable diaper that does not get in the way when wearing a diaper and is a sanitary disposal method.
The present invention relates to a pants-type disposable diaper in which is disposed.

[0002]

2. Description of the Related Art Conventionally, as a disposal method of a pants-type disposable diaper, Japanese Utility Model Laid-Open Publication No. 4-117618 discloses an adhesive application section provided at a joint free end on a waist side.
A method has been proposed in which a diaper containing excrement is rounded so that the excrement does not leak out, and the excrement is wrapped inside using an adhesive application section and disposed of. This is a tab extended on the waist side, but it is necessary to increase the width of the material forming the diaper in order to attach the tab, which increases the cost, and furthermore, the bonding area cannot be substantially widened. There was a problem, not always enough. Further, it has been proposed to use a stretchable elastic material for a tape used at the time of disposal. However, if the diaper at the time of disposal is rolled and the tape is stretched and fixed to the back sheet, the tape tends to come off due to the contraction force of the tape, which is not sufficient.

In Japanese Utility Model Publication No. 8-10305,
There is disclosed a pants-type diaper in which one end of a strip-shaped tape fastener for fastening at the time of disposal is fixed and folded in the longitudinal direction thereof so as to be disposed at the center of the back side of the diaper. Since this tape fastener must have a length that can exceed the opening of the waist part of the pants-type diaper, it is folded and disposed so as not to interfere with the mounting of the diaper, which is simple and effective. Means. However, besides the purpose of fastening, the adhesive part is necessary to keep the tape fastener folded, and in the state where the tape fastener is fastened at the time of disposal, the adhesive part on the outer surface side of the diaper However, the tape fastener may stick to surrounding objects or other wastes due to the adhesive strength, and the tape fastener may be accidentally detached, which is not sufficient. In addition, it is necessary to consider the possibility that the wearer or discarder may accidentally touch the skin,
If the back sheet for fixing the auxiliary tape is difficult to fix, such as a nonwoven fabric, there is a problem that the auxiliary tape is liable to come off easily.

[0004]

DISCLOSURE OF THE INVENTION The present invention overcomes the above-mentioned conventional problem of a pants-type disposable diaper having a disposal means used at the time of disposal, and does not become a hindrance at the time of wearing. In the case of disposal, it can be quickly and simply rolled and fixed, and it can be fixed without accidentally disengaging and opening the diaper,
An object of the present invention is to provide a pants-type disposable diaper to which an auxiliary tape capable of firmly attaching is attached.

[0005]

Means for Solving the Problems A first aspect of the present invention comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between these two sheets, and In a pants-type disposable diaper in which a waist opening and a pair of leg openings are formed by joining opposing side edges of a front body located on a ventral side and a back body located on a back side,
An auxiliary tape is disposed on the back sheet surface of the front body side or the back body side of the diaper, and the auxiliary tape includes a center area and two end areas, and the center area is adhesively fixed to the back sheet. A fixing portion is formed, the two end regions are turned over on the fixing portion and overlapped with each other, and the pressure-sensitive adhesive layers are formed on opposing surfaces of the overlapped two end regions, respectively, and provided separately. Via the release agent layer, the auxiliary tape is peelably joined, and when the diaper is discarded, the auxiliary tape is rounded or folded to go around the outer periphery thereof, and that the pressure-sensitive adhesive layers in the end region can be joined to each other. It is a pants-type disposable diaper that is a feature.

A second aspect of the present invention is that, in the two end regions of the auxiliary tape, an adhesive layer and a release agent layer are formed on surfaces facing each other in a state of being folded on the fixing portion and superposed. Wherein a pressure-sensitive adhesive layer and a release agent layer on one surface are respectively bonded to a release agent layer and a pressure-sensitive adhesive layer on the other surface, and are releasably joined. The pants-type disposable diaper according to the invention described in the above item.

[0007] A third aspect of the present invention is the pants-type single-use trouser according to the first or second invention, wherein the auxiliary tape is elongated in the longitudinal direction of the diaper. It is a diaper.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The pants-type disposable diaper according to the present invention has an auxiliary tape disposed on a front sheet side or a back sheet side of a back sheet surface, and a central region of the auxiliary tape is
Adhesively fixed to the back sheet to form a fixing portion, and the two end regions are folded inward and overlap each other on the fixing portion, and further, the facing surfaces of the two end regions are Each has an adhesive layer,
The end regions of each other are releasably joined. Form both an adhesive layer and a release agent layer on each of the surfaces facing each other, and affix the adhesive layer and the release agent layer on one surface to the release agent layer and the adhesive layer on the other surface, respectively. By combining them, it can be made peelable. As another method, a method in which a sheet having a release agent layer is inserted between mutually facing surfaces having an adhesive layer in an end region can be used.

In the pants-type disposable diaper of the present invention having the above-described structure, when the diaper is to be discarded, first, an end region forming an outer surface of the auxiliary tape is picked up, and the end region is folded. And pull it in the longitudinal direction of the auxiliary tape to extend it. Next, after the diaper is rolled or folded, the other end region of the auxiliary tape that is exposed on the outer surface is picked up, pulled in a direction opposite to the direction in which the end region was previously pulled, and the auxiliary tape is used. The pressure-sensitive adhesive layers in the two end regions are adhered to each other so as to be wrapped around one circumference, and the diaper is kept in a rolled or folded state and is discarded. Very strong adhesion is obtained because the adhesives are bonded to each other, and in addition, there is no adhesive part on the outer surface side of the diaper, so the auxiliary tape does not come off accidentally and can be used hygienically. Diapers can be discarded. In addition, when the diaper is attached, both end regions of the auxiliary tape are folded back, so that the area for attachment to the diaper main body is small, and the fit of the diaper is not impaired. Note that the end region of the auxiliary tape in the present invention means a folded region including the end of the auxiliary tape, and the auxiliary tape of the present invention is formed by folding lines into three portions of a fixed portion and two end regions. Divided.

The attachment position of the auxiliary tape is on the back sheet surface on the front body side or the back body side. Diaper width direction
It is more preferable to dispose it at a substantially central portion (in a direction perpendicular to the longitudinal direction) elongated along the longitudinal direction. If the diaper is disposed to be elongated along the longitudinal direction at a substantially central portion in the width direction, it is easy to roll and fix the diaper at the time of disposal, and it is easy to hold the diaper in a rolled state.

The auxiliary tape may have knob portions formed at both ends. When the knob portion is formed, the end region of the auxiliary tape can be easily picked up, so that the handling is simplified.

As the material of the auxiliary tape in the present invention, an extensible material (may have elasticity)
Also, those having no extensibility can be used. Further, it may be in the form of a film or a non-woven fabric. Examples of the material having no extensibility include, for example, polyolefin resins such as polypropylene, polyethylene, and polystyrene; polyester resins such as polyethylene terephthalate, polybutylene terephthalate and copolymers thereof; polyamide resins such as nylon 6 and nylon 66; Biodegradable resins such as polyvinyl alcohol-based resin, polyacrylonitrile-based resin, polylactic acid, and fatty acid polyester are exemplified. Examples of the extensible material include a urethane film, a plastic elastomer (such as a low-density polyethylene film), and a rubber sheet.
The use of extensible auxiliary tape makes it possible to further reduce the area required for attaching the auxiliary tape to the diaper body, so that the fit of the diaper is not impaired, there is little external discomfort, and it is also easy to bond the adhesives together Is more preferable.

[0013] The basis weight of the auxiliary tape is preferably 8~150g / m ^2, more preferably 10 to 50 g / m ^2. When the basis weight is less than 8 g / m ² , not only the strength is weak but also there is no stiffness, and handling of the auxiliary tape is inconvenient. On the other hand, if the grammage exceeds 150 g / m ² , the auxiliary tape becomes hard and the fit becomes poor when the diaper is attached, which is not suitable.

The length of the auxiliary tape (in a stretched state in the case of an extensible tape) is determined by making a round around the outer circumference of the diaper in a state where the diaper is rolled or folded at the time of discarding, so that the pressure-sensitive adhesive layers at the respective end regions of the auxiliary tape are connected. A length that can be joined is required. In this case, the outer circumference of the diaper varies depending on the size, material, thickness, amount of excrement, etc. of the diaper, but in the case of a general diaper, the total length of the auxiliary tape (when stretchable, the extended state) It is preferably about 15 cm or more.

The length of the fixing portion of the auxiliary tape is 1 cm to 8 cm.
cm. If it is less than 1 cm, it is difficult to securely fix the auxiliary tape to the back sheet of the diaper. On the other hand, if it exceeds 8 cm, it is undesired because it interferes with mounting. The length of both end regions of the auxiliary tape is preferably equal to or less than the length of the fixed portion, and considering the minimum length described in the above column, the auxiliary tape may be extensible or non-extensible. It is preferably 1 to 8 cm inclusive. If it is less than 1 cm, it is difficult to roll up the diaper, make a round around the diaper, and bond and fix the adhesive layers in the end region. Regarding the upper limit, since the preferable length of the fixing portion is 8 cm or less, 8 c
m or less is preferable.

The width of the auxiliary tape is preferably 1 to 4 cm. If it is less than 1 cm, the auxiliary tape is too thin and inconvenient to handle. On the other hand, if it exceeds 4 cm, the width is too wide to be in the way when worn.

An adhesive layer is formed on each of the two end regions of the auxiliary tape facing each other in a state of being folded on the fixing portion and being superimposed on each other. are doing. Further, the pressure-sensitive adhesive layer may be formed on a part of the end region or on the whole.

The pressure-sensitive adhesive forming the pressure-sensitive adhesive layer of the present invention is not particularly limited, but may be a rubber-based or acrylic-based pressure-sensitive adhesive. For example, styrene-butadiene-styrene copolymer, styrene-isoprene-styrene copolymer , An acrylic ester, a vinyl acetate ethylene-vinyl acetate copolymer or the like as a main component.

In a state where the two end regions of the auxiliary tape are folded back so that the two end regions can be peeled off from each other, the auxiliary tape covers the entire area of the adhesive layer at one end region. A release agent layer may be provided on the other end region. Further, a sheet having a release agent layer may be interposed between the two end regions.

The release agent for forming the release agent layer of the present invention is not particularly limited, and examples thereof include silicone-based, non-silicone-based resins such as long-chain alkyls, and fluorine-based resins.

The auxiliary tape is provided with a fixing adhesive layer for bonding and fixing to the back sheet. The material of the fixing adhesive layer is not particularly limited, but may be any known adhesive or the like as long as it can be fixed to the back sheet without slipping, using the same adhesive as that used for the adhesive layer. No problem.

The top sheet of the diaper of the present invention is a liquid-permeable sheet, and is made of polyester, polypropylene,
Liquid-permeable nonwoven fabrics and woven fabrics made of synthetic fibers made of polyethylene, other thermoplastic resins, or the like are used.
Natural fibers may be used, and the fibers can be manufactured from a wide range of materials such as a combination of synthetic fibers and natural fibers.
In any case, the liquid-permeable topsheet is a portion that is in direct contact with the skin, so that it may be soft and comfortable, and may be breathable. Since the center region in the width direction of the topsheet is disposed on the absorber, it is preferable that the centersheet be made of hydrophilic fibers so that the liquid can be transmitted quickly. In addition, it is preferable that both side edges in the width direction of the liquid-permeable topsheet are water-repellent so as not to seep out from the absorber that has absorbed the liquid.

Further, the liquid-permeable top sheet does not need to be constituted by a single sheet, but may be constituted by a plurality of sheets such as a center surface sheet and a side surface sheet. Also, when composing a topsheet with multiple sheets,
Each sheet may be made of a different material or the same material.

The back sheet of the diaper of the present invention is a liquid-impermeable sheet, and is also a member for attaching an auxiliary tape.
Liquid impermeable film such as polyethylene, a material in which a nonwoven fabric or a woven fabric is bonded to a liquid impermeable film, or a nonwoven fabric having a leakproof property, a woven fabric, etc., and there is no particular limitation. Any material that does not allow moisture to seep outside the diaper may be used. Further, it may be embossed in a pattern to give a cloth-like appearance, or may be further matte-finished. When a film is used, a known moisture-permeable film that is permeable to water vapor only while being impermeable may be used, and is preferable because it prevents stuffiness. Further, the material may be elastic so as to fit the wearer. Use of a polyurethane film, a natural rubber sheet, a foamed sheet, or the like is conceivable, and a material in which an elastic nonwoven fabric or the like is bonded may be used.

[0025] The absorbent article of the diaper of the present invention comprises floc pulp,
It is not particularly limited as long as it is formed of a superabsorbent polymer substance, a hydrophilic sheet, or the like and has a water absorbing property. The absorbent used in the present invention is made from conventional absorbent materials commonly used in conventional disposable diapers and other absorbent articles. That is, it is formed from a single-layer or multi-layer mat made of absorbent fibers such as cotton-like pulp and rayon, wrapped by a hydrophilic sheet, and a highly water-absorbing polymer is uniformly mixed in each mat. Alternatively, they are arranged in layers between the mats. Further, the absorbent in which the superabsorbent polymer material is uniformly mixed may be heat-compressed after mixing 3 to 60% by weight of the heat-fusible substance with respect to the cotton-like pulp. Only the water-absorbing polymer substance may be wrapped by the hydrophilic sheet.

The shape of the absorber may be hourglass, rectangular, T
There is no particular limitation on the character shape, etc., as long as the shape fits the inseam. In general, in order to improve the feeling of wearing, it is particularly preferable to have a shape in which the crotch portion is narrowed, such as an hourglass shape or a T shape.

Further, the elastic member is disposed in an extended state at the opening around the leg, the opening around the waist, etc. of the diaper, and is adhered and fixed with a hot melt adhesive. As the elastic member, a urethane film, urethane thread, urethane foam, thread rubber or the like is used.

[0028]

EXAMPLES The diaper according to the present invention will now be described more specifically with reference to examples, but the present invention is not limited to these examples. FIG. 1 is a perspective view of a pants-type disposable diaper of the present invention. In FIG. 1, a pants-type disposable diaper 1 according to the present invention includes
It has an opening 3 around the waist, the front body 4 and the back body 5 are adhesively closed by a side seam 6, and the back sheet 7 forming the outer surface of the back body 5 has a substantially central portion in the width direction of the diaper. Along the longitudinal direction (the direction from the opening 3 around the waist toward the crotch 9), the auxiliary tape 8 is disposed.

FIG. 2 is a cross-sectional view along the longitudinal direction of the auxiliary tape 8 disposed on the diaper of the present invention, showing a state in which the auxiliary tape 8 is folded and laminated on the back sheet 7.
In FIG. 2, the auxiliary tape 8 is bonded and fixed to the back sheet 7 in a central region 10 in the longitudinal direction of the auxiliary tape 8 by a fixing adhesive layer 11 provided on a surface facing the back sheet 7. The area of the auxiliary tape 8 adhered to the back sheet 7 is used as a fixing section 10 on the fixing section 10.
An adhesive layer 13 and a release agent layer 14 are provided on the folded end region 12 (to be in contact with the fixing portion) so as to be located outside in a folded state.
An adhesive layer 16 and a release agent layer 17 are also provided on the surface facing the end region 12 in the other end region 15 that is folded and stacked on the top 2. That is, both end regions are releasably attached such that the release agent layer 17 covers and contacts the adhesive layer 13 and the release agent layer 14 covers and contacts below the adhesive layer 16. ing.

FIG. 3 is a cross-sectional view along the longitudinal direction of the auxiliary tape disposed on the diaper of the present invention, which is different from FIG. 2, and shows a state in which the auxiliary tape 8 is folded on the back sheet 7. In FIG. 3, an adhesive layer 13 is provided on an end region 12 folded on the fixing portion 10 (to be in contact with the fixing portion 10) so as to be located outside in a folded state. The pressure-sensitive adhesive layer 16 is also provided on the surface facing the end region 12 in the end region 15 that is folded back on the partial region 12. A sheet 18 having release agent layers 14 and 17 on both sides is interposed between the two end regions, and both end regions are releasably bonded.

FIG. 4 shows a state in which the folded end portion 15 of the auxiliary tape 8 shown in FIG. 2 which forms the outer surface is peeled off and picked up.

FIG. 5 shows a state in which, in the auxiliary tape 8 shown in FIG. 4, the end region 12 which is folded back so as to be in contact with the fixing portion 10 is also picked up.

FIG. 6 is a perspective view showing a state in which the pants-type disposable diaper of the present invention shown in FIG. 2 is rolled and fixed. Round the diaper that has been used and contains excrement such as loose stool in the longitudinal direction, close it so as to wrap the excrement inside the diaper, and wrap it around the diaper with the auxiliary tape 8 so as not to open it. Pressure-sensitive adhesive layers (pressure-sensitive adhesive layer 13
And 16). The very strong adhesion prevents excrement leakage and spillage due to accidental removal of the auxiliary tape.

[0034]

The auxiliary tape in the pants-type disposable diaper according to the present invention has a size that does not disturb the wearing of the diaper, and can be quickly and simply rolled and fixed so as not to open the diaper without impairing the fit. It is. further,
Because the adhesives are bonded together, very strong adhesion is obtained, and when the diaper is rolled up, there is no adhesive layer on the outer surface side of the diaper, and the auxiliary tape does not come off. Can be discarded.

[Brief description of the drawings]

FIG. 1 is a perspective view of a pants-type disposable diaper according to the present invention.

FIG. 2 is a cross-sectional view along a longitudinal direction of the auxiliary tape disposed on the diaper of the present invention, showing a state in which the auxiliary tape is folded and laminated on the back sheet.

FIG. 3 is a cross-sectional view along a longitudinal direction of the auxiliary tape disposed on the diaper of the present invention in a different example from FIG. 2, showing a state in which the auxiliary tape is folded and laminated on the back sheet.

FIG. 4 is a cross-sectional view of the auxiliary tape shown in FIG. 2, taken along a longitudinal direction, showing a state in which an end region forming an outer surface of the auxiliary tape is peeled off and picked up;

FIG. 5 is a cross-sectional view along the longitudinal direction of the auxiliary tape, showing a state in which an end region folded back so as to be in contact with a fixing portion of the auxiliary tape shown in FIG. 4 is also picked up;

6 is a perspective view showing a state in which a diaper that has been rolled in the longitudinal direction is fixed by the auxiliary tape shown in FIG. 2;

[Explanation of symbols]

 1. Pants-type disposable diaper 2. Leg opening 3. Waist opening 4. Front body 5. Back body 6. Side seam 7. Back sheet 8. Auxiliary tape 9. Crotch 10. Fixed part 11. Fixing adhesive layer 12. Edge region folded back so as to be in contact with the fixing portion 13. Adhesive layer 14. Release agent layer 15. Edge region folded back to form the outer surface of auxiliary tape 16. Adhesive layer 17. Release agent layer 18. Sheet having release agent layer

Claims (3)

[Claims] 1. A front body and a back side which are composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between these two sheets, and are located on the abdomen of the wearer. In a pants-type disposable diaper in which the opposite side edges of the back body are joined to form a waist opening and a pair of leg openings, the back sheet on the front body side or the back body side of the diaper An auxiliary tape is disposed on the front surface, the auxiliary tape includes a central region and two end regions, and the central region is adhesively fixed to the back sheet to form a fixing portion. The adhesive layer is formed on the facing portions of the two end regions that are folded back on the fixing portion and are overlapped with each other, and the adhesive layers are respectively formed on the facing surfaces of the two end regions that are overlapped with each other. And the auxiliary tape is diaper A pants-type disposable diaper characterized by being able to make a round around the outer periphery of a rolled or folded diaper at the time of disposal and to be able to bond the adhesive layers in the end region. 2. The two end regions of the auxiliary tape include:
An adhesive layer and a release agent layer are respectively formed on surfaces facing each other in a state where the adhesive layer is folded on the fixing portion and overlapped, and the adhesive layer and the release agent layer on one surface are separated from each other on the other surface. The pants-type disposable diaper according to claim 1, wherein the pants-type disposable diaper is bonded to the agent layer and the pressure-sensitive adhesive layer, respectively, and is releasably joined. 3. The pants-type disposable diaper according to claim 1, wherein the auxiliary tape is disposed to be elongated in the longitudinal direction of the disposable diaper.