JP6942591B2 - Outer installation type disposable diaper - Google Patents

Description

The present invention relates to a disposable diaper such as a pants type or a disposable diaper installed inside an outerwear which is used by being fixed to the inner surface of an underwear (hereinafter, also collectively referred to as an outerwear).

A typical example of such an outer-installed type is an outer-installed disposable diaper, which is generally called an absorption pad and is used by attaching it to the inner surface of the outer for the purpose of reducing diaper changing costs and toilet training. (See, for example, Patent Document 1 or 2).

A general outer-mounted disposable diaper has a basic structure in which an absorber is interposed between a liquid-permeable top sheet and a liquid-impermeable sheet, and depending on the product, an exterior sheet made of non-woven fabric or the like. Covers the back side of the impermeable sheet. Further, on the back surface of a general outer-installed type disposable diaper, a fixing portion made of an adhesive layer or a hook tape of a hook-and-loop fastener (mechanical fastener) is provided, and this fixing portion engages with the inner surface of the diaper or underwear. By being stopped, it is designed to prevent slippage during mounting.

For disposable diapers installed inside the outer, an adhesive layer is provided on the outside opposite to the side of the skin, and a release sheet (usually release paper) is provided on the outside in order to attach it to cloth pants or paper diapers. Is peeled off and attached to cloth pants or disposable diapers via an adhesive layer (Patent Documents 1 and 2).

Japanese Patent No. 4392857 Japanese Unexamined Patent Publication No. 5564293

However, even if the outer-installed type disposable diaper is used by fixing it in the outer such as cloth pants or pants-type disposable diapers via, for example, the adhesive layer, both feet of the wearer are cloth pants or pants. When inserting from the waist opening of the type disposable diaper into the opening around the legs, the type disposable diaper installed inside the outer may come off from the outer and shift from the intended position, causing leakage.

The present inventor has found that the cause of this situation is that when the foot is inserted through the waist opening of the outer, the tip of the foot is caught by the edge of the disposable diaper installed in the outer.

Therefore, a main object of the present invention is to make the structure easy to wear and prevent the diaper from slipping off the outerwear.

The outer-mounted disposable diaper of the present invention that solves the above problems is
A disposable diaper that has a liquid-permeable top sheet, a liquid-impermeable sheet, and an absorber interposed between them, and is installed inside the outer to be used.
The length of the diaper in the front-back direction is longer than the length in the front-back direction from the front end to the back end through the inseam on the inner surface of the outer, and extends back and forth from the front end and the back end of the outer, respectively.
This extension area is configured to extend over the front and back ends of the outer and overlap the back of the outer.
Each extension region is a highly flexible region that does not have the absorber.

In the present invention, the extension area extending in the front-rear direction from the main body of the disposable diaper installed in the outer is configured to overlap the back surface of the outer over the front end and the back end of the outer. When you insert your foot through the waist opening of the diaper, you can insert your foot as it is without the tip of your foot getting caught in the edge of the disposable diaper installed inside the outerwear. As a result, the diaper is less likely to slip off the outerwear.
Further, since the wearer's toes can be inserted as they are without being caught by the outer waist opening edge, the result is easy to wear.
Thus, the diaper of the present invention is easy to wear and hard to slip.

The extension region can have an additional sheet laminated and added to the base material of the diaper facing the outer.
Due to the presence of the additional sheet, for example, a non-woven fabric sheet with a high basis weight, the additional sheet laminated area is slightly increased in rigidity and does not become flat, and it becomes easy to grab the additional sheet laminated area and fold it back so as to be overlapped on the back surface of the outer. After folding back, the state of overlapping with the back surface of the outer is maintained stably.

The extension region can have an additional sheet laminated and added to the base material of the diaper facing the outer, and a plurality of additional sheets are provided along the width direction at intervals in the front-rear direction. It can be configured.
Depending on the size of the outer, it is possible to select which additional sheet to fold back at the base side, and the installation form can be selected according to the size of the outer, increasing versatility.

A pressure-sensitive adhesive layer and a release sheet covering the pressure-sensitive adhesive layer can be provided in the extension region.
The folded portion can be stably fixed to the back surface of the outer via the adhesive layer.

The configuration in which the pressure-sensitive adhesive layer and the release sheet covering the pressure-sensitive adhesive layer are provided in the extension region can be combined with the form having the pressure-sensitive adhesive layer and the release sheet covering the pressure-sensitive adhesive layer provided on the back surface of the diaper body facing the outer.

Further, on the back surface of the diaper body, an adhesive layer provided so as to face the outer may extend to an extension region, and the extended adhesive layer and an extended release sheet covering the extended adhesive layer may be provided.

The extension region has extending portions extending from the widthwise edge of the diaper body to both sides, and an adhesive layer and a release sheet covering the adhesive layer are applied to the base material facing the outer in each extending portion. Can be provided.
The adhesive layer of the extending portion extending in the width direction can be a fixing portion to the side portion instead of the abdomen and back of the outer, and is highly stable against displacement.
Instead of the pressure-sensitive adhesive layer, a hook material for a mechanical fastener may be provided for the outer.

Instead of the pressure-sensitive adhesive layer in the extension region, the structure may have a hook material for a mechanical fastener with respect to the outer.
The hook material can be entwined and engaged with the fibers on the outer outer surface.

As described above, according to the present invention, it is possible to have a structure that is easy to wear and that the diaper does not easily slip off from the outerwear.

It is a top view which shows the surface side of the unfolded state of the outer-installed type disposable diaper. It is a top view which shows the back side of the unfolded state of the outer type disposable diaper. FIG. 1 is a cross-sectional view taken along the line AA of FIG. FIG. 1 is a cross-sectional view taken along the line BB of FIG. FIG. 1 is a cross-sectional view taken along the line CC of FIG. It is a perspective view which shows the wearing procedure of the disposable diaper which is installed in the outer. It is sectional drawing of the A-A line position of the outer-installed type disposable diaper of an example in which an exterior sheet is not provided. It is a top view of the use surface (opposite surface of a wearer) side of the outer-installed type disposable diaper which concerns on this invention. It is the back view. It is a perspective view which shows the wearing procedure of the outer-installed type disposable diaper which concerns on this invention. It is a top view of another embodiment. It is a top view of the example which provides the hook material. It is a top view of the example which provided the pressure-sensitive adhesive layer. It is a perspective view which shows the wearing procedure of the outer-installed type disposable diaper of the example which provided the adhesive layer. It is a top view of the example which has the extension part in the width direction. It is a top view of the example by changing the shape of the edge in the longitudinal direction.

Prior to the description of the embodiment of the present invention, a structural example of an outer-mounted type (pad type) disposable diaper that has been generally used in the past will be described.
Note that this structural example also applies to the disposable diapers of the present invention.

<Conventional example or general structure example>
1 to 6 show a conventional outer-mounted disposable diaper 200. The outer-mounted disposable diaper 200 has a ventral portion F1 extending forward and a dorsal portion B1 extending posteriorly with respect to the center in the front-rear direction. The dimensions of each part can be appropriately determined. For example, the total length (length in the front-rear direction) L1 of the article can be about 150 to 500 mm, and the total width W1 can be about 120 to 200 mm.

The outer-mounted disposable diaper 200 has a basic structure in which an absorber 23 is interposed between the inner surface of the liquid-impermeable sheet 21 and the liquid-permeable top sheet 22. As the absorbent body 23, a composite fiber of pulp fibers, an aggregate of filaments such as cellulose acetate, or a non-woven fabric is basically used, and a highly absorbent polymer is mixed and fixed as needed. .. If desired, the absorber 23 can be wrapped in crepe paper (not shown). Further, the shape of the absorber 23 can be an appropriate shape such as a band shape in which the front side portion is relatively wider than the rear side portion, a rectangular shape, a trapezoidal shape, or the like. The fiber weight and the weight of the absorbent polymer in the absorber 23 can be appropriately determined, but the fiber weight is ^{preferably about 100 to 300 g / m 2,} and the weight of the absorbent polymer is about 0 to ^{200 g / m 2.} It is preferable to do so.

A liquid-impermeable sheet 21 is provided on the back surface side of the absorber 23 so as to protrude from the peripheral edge of the absorber 23 by a predetermined length. As the liquid impermeable sheet 21, in addition to a polyethylene film or the like, a sheet having moisture permeability without impairing water shielding can be used from the viewpoint of preventing stuffiness. This water-impervious / moisture-permeable sheet is a microporous sheet obtained by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching it in a uniaxial or biaxial direction. Can be used.

The outer surface (back surface) of the liquid-impermeable sheet 21 is covered with the exterior sheet 25. Various non-woven fabrics can be used as the exterior sheet 25. As the material fiber constituting the non-woven fabric, olefin-based fibers such as polyethylene or polypropylene, polyester-based synthetic fibers such as polyester-based and amide-based fibers, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.

The surface side of the absorber 23 is covered with a liquid-permeable top sheet 22. In the illustrated embodiment, the absorber 23 partially protrudes from the side edge of the liquid-permeable top sheet 22, but the width of the top sheet 22 can be widened so that the side edge of the absorber 3 does not protrude. As the top sheet 22, a perforated or non-perforated non-woven fabric, a perforated plastic sheet, or the like is used. As the material fiber constituting the non-woven fabric, olefin-based fibers such as polyethylene or polypropylene, synthetic fibers such as polyester-based and amide-based fibers, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.

At both ends of the outer-mounted disposable diaper 200 in the front-rear direction, the exterior sheet 25 and the liquid-permeable top sheet 22 are stretched and bonded to each other on both front and rear sides of the absorber 23 from the front and rear ends, and the absorber 23 does not exist. The end flap portion EF is formed.

On both sides of the outer-mounted disposable diaper 200, the liquid-impermeable sheet 21 extends outward from the side edge of the absorber 23, and the inner surface of the portion from this extending portion to the side portion of the top sheet 22. A portion 24x on the outer side in the width direction of the gather sheet 24 is attached to the entire surface in the front-rear direction to form a side flap portion SF in which the absorber 23 does not exist. The bonded portion of the material including these can be formed by a hot melt adhesive, a heat seal, and an ultrasonic seal, and is shown by a diagonal line pattern in the drawing.

Absorber-mediated portions other than the end flap portion EF and the side flap portion SF form a main body portion that holds excrement.

As the material of the gather sheet 24, a plastic sheet or a melt blown non-woven fabric can be used, but from the viewpoint of touch to the skin, a non-woven fabric treated with water repellent treatment such as silicone is preferably used.

The portion 24c on the center side in the width direction of the gather sheet 24 extends to the top sheet 22, and an elongated elastic member 24G is hot in a stretched state along the front-rear direction at the end portion on the center side in the width direction. It is fixed with a melt adhesive or the like. The elongated elastic member 24G includes styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, polyester and the like formed in a thread shape, a string shape, a strip shape and the like. , Usually used materials can be used.

In both gather sheets 24 and 24, the outer portion 24x in the width direction is bonded and fixed to the inner surface of the article (the surface of the top sheet 22 and the inner surface of the exterior sheet 25 in the illustrated form) over the entire front-rear direction, and the portion on the center side in the width direction. 24c is attached and fixed to the inner surface of the article (the surface of the top sheet 22 in the illustrated form) at both ends in the front-rear direction, and is fixed to the inner surface of the article (the surface of the top sheet 22 in the illustrated form) between both ends in the front-rear direction. Not. As shown in FIG. 4, this non-fixed portion is a portion that becomes a three-dimensional gather that can stand up against the inner surface of the article (the surface of the top sheet 22 in the illustrated form), and the standing base end 24b is the width of the gather sheet 24. It is located at the boundary between the fixed portion 24x on the outer side in the direction and the fixed portion 24c on the inner side.

Then, as shown in FIGS. 2, 3 and 5, a pressure-sensitive adhesive layer 30 is provided on the back surface of the exterior sheet 25 of the outer-installed disposable diaper 200, and the fixing has a release sheet 31 that covers the outer sheet in a removable manner. The part is formed.

In the illustrated example, the fixing portion is continuously provided along the front-rear direction, but it may be provided in each of the ventral side portion F1 and the dorsal side portion B1, or may be provided in only one of them. When a plurality of fixing portions are provided, it is preferable to provide at least one of each in the ventral side portion F1 and the dorsal side portion B1.

<Example of the present invention>
In the present invention, as shown in FIGS. 8 and 9, the length of the outer-mounted disposable diaper 20 in the front-rear direction passes through the inseam from the front end 100f (see FIG. 10) of the waist opening on the inner surface of the outer 100. It is longer than the length in the front-rear direction up to the back body end 100b, and extends from the front body end and the back body end of the outer 100 to the front and back as extension areas X, respectively, and this extension area X extends to the front body end and the back body of the outer. It is configured to overlap the back of the outer over the edge.
The extension region X is a highly flexible region that does not have the absorber 23.
Further, in order to clarify the difference from the conventional example, the position of the end flap portion EF described in the conventional example is illustrated.

In the present invention, the back surface of the outer 100 is formed by folding back the extension region X beyond the front end 100f and the back end 100b of the outer in the extension portion extending back and forth from the main body of the outer inner-installed type disposable diaper 20. When the foot is inserted through the waist opening of the outer 100, the tip of the foot does not get caught in the edge of the diaper 20 and the foot can be inserted as it is. As a result, the diaper 20 is less likely to be displaced from the outer 100.
Further, since the wearer's toes can be inserted as they are without touching the waist opening edge of the outer 100, the result is easy to wear.
Thus, the disposable diaper 20 is easy to wear and hard to slip.

The extension region X can have an additional sheet 10 laminated and added to the base material of the diaper (for example, the above-mentioned exterior sheet 25 or the liquid impermeable sheet 21) facing the outer 100.
Due to the presence of the additional sheet 10, for example, a non-woven fabric sheet having a high basis weight (for example, 25 g / m ² or more), the thickness of the additional sheet 10 laminated area is slightly increased, and the additional sheet 10 laminated area is grasped without being fluffy. The operation of folding back so as to overlap the back surface of the outer 100 becomes easy, and after folding back, the state of being stably overlapped with the back surface of the outer 100 is maintained.
The material of the additional sheet 10 is not limited, but a non-woven fabric sheet is preferable from the viewpoint of touching the skin, but a laminated sheet of the non-woven fabric and another sheet may also be used. The additional sheet 10 can be laminated by adhering to the base sheet of the disposable diaper 20 with, for example, a hot melt adhesive.
Further, as the additional sheet 10, a silicone resin sheet or the like can also be used.
On the other hand, in the illustrated example, the additional sheet is provided on the surface facing the outer 100 in the used state, but may be provided on the surface opposite to the extension region X, and may be further provided on each surface. ..

If necessary, a crease in the width direction, for example, a perforation 11 can be provided in the vicinity of the additional sheet 10. The perforation 11 becomes a crease when the extension region X is folded back. Further, when the extension region X is unnecessary, the perforation 11 can be broken and discarded.

As shown in FIG. 11, the additional sheets 10 may be provided at a plurality of positions along the width direction at intervals in the front-rear direction, for example, at three locations as shown in the drawing.
Depending on the size of the outer 100, it is possible to select which additional sheet to fold back at the base side, and the installation form according to the size of the outer 100 can be selected, increasing versatility.

13 to 15 are examples in which an adhesive layer and a release sheet covering the adhesive layer are provided in the extension region X. The folded portion can be stably fixed to the back surface of the outer 100 via the adhesive layer 13.

The structure in which the pressure-sensitive adhesive layer 13 and the release sheet 14 covering the pressure-sensitive adhesive layer 13 are provided in the extension region X is provided on the back surface of the main body of the diaper 20 so as to face the outer 100, for example, the pressure-sensitive adhesive layer 30 and the pressure-sensitive adhesive layer 30 shown in FIG. It can be combined with a form having a release sheet 31 covering the above.

According to this idea, as shown in FIG. 13, an adhesive layer 13 provided on the back surface of the diaper 20 body facing the outer 100 is extended to the extension region X, and the adhesive layer 13 extends to the extension region X. And a extending peeling sheet 14 for covering the sheet can be provided.
In the example of FIG. 13, in the extension region X, in addition to the extending adhesive layer 13 extending from the main body, a short adhesive layer 13a provided only in the extension region X is also provided. By providing the short adhesive layer 13a in addition to the extending adhesive layer 13 in the extension region X where the prevention of displacement is particularly desired, it is possible to effectively prevent the displacement while suppressing the amount of the adhesive used.

Further, as shown in FIG. 15, the extension region X has an extending portion 20a extending on both sides from the widthwise edge of the diaper 20 body, and each extending portion 20a is provided with an adhesive layer 13b and the adhesive layer 13b. A release sheet 14 for covering can be provided.
The fixed portion of the extending portion 20a extending in the width direction by the adhesive layer 13b is not fixed to the abdomen and back of the outer 100 but to the side portion, and thus has high stability against displacement.

Instead of the pressure-sensitive adhesive layer in the extension region X, as shown in FIG. 12, a structure having a hook material 12 for a mechanical fastener with respect to the outer 100 can be provided.
The hook material 12 can be entwined and engaged with the outer surface fibers of the outer 100 (for example, the non-woven fabric on the outer surface of the pants-type disposable diaper or the cloth fibers on the outer surface of the cloth pants).
As the mechanical fastener and its hook material, those known or general-purpose in the present technical field can be used as they are.

If the extension region X is angular, the corners may hit the wearer's skin and can be chamfered as shown in FIG. The additional sheet 10A is also chamfered.

The present invention can be used for disposable diapers in forms other than the disposable diapers installed inside the outer as long as they are fixed to the inner surface of the outer.

10 ... Additional sheet, 12 ... Hook material, 20 ... Outer inner installation type disposable diaper of the example of the present invention, 21 ... Liquid permeable sheet, 22 ... Top sheet, 23 ... Absorbent, 24 ... Gather sheet, 25 ... Exterior sheet , 30 ... Adhesive layer, 31 ... Release sheet, 100 ... Outer, 200 ... Conventional outer-installed type disposable diaper, X ... Extension area.

Claims (6)

A disposable diaper that has a liquid-permeable top sheet, a liquid-impermeable sheet, and an absorber interposed between them, and is installed inside the outer to be used.
The length of the diaper in the front-back direction is longer than the length in the front-back direction from the front end to the back end through the inseam on the inner surface of the outer, and extends back and forth from the front end and the back end of the outer, respectively.
The extension area extending back and forth from the diaper body is configured to extend beyond the front and back ends of the outer and overlap the back of the outer.
Each extension region is a highly flexible region that does not have the absorber .
The extension region has an additional sheet laminated and added to the base material of the diaper facing the outer, and a plurality of the additional sheets are provided along the width direction at intervals in the front-rear direction.
A disposable diaper that is installed inside the outerwear. The disposable diaper installed in an outerwear according to claim 1, wherein the extension region is provided on a base material of the diaper facing the outerwear, and has an adhesive layer and a release sheet covering the adhesive layer. It has an adhesive layer and a release sheet covering the adhesive layer provided on the back surface of the main body so as to face the outer.
The disposable diaper installed in an outerwear according to claim 1, wherein the extension region is provided on a base material of the diaper facing the outerwear, and has an adhesive layer and a release sheet covering the adhesive layer. On the back surface of the diaper body, there is a extending adhesive layer and a extending peeling sheet covering the extending adhesive layer provided so as to face the outer.
The outer-mounted disposable diaper according to claim 1, wherein the extending adhesive layer and the extending release sheet covering the extending adhesive layer extend to the extension region. The in-outer installation type disposable diaper according to claim 1, wherein the extension region is provided on a base material of the diaper facing the outer, and has a hook material of a mechanical fastener for the outer. The extension region has extending portions extending to both sides from the widthwise edge of the main body, and a mechanical fastener for the outer is provided for a base material facing the outer in each extending portion. The outer-mounted disposable diaper according to claim 1, which has a hook material of.

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