JP3373710B2 - Disposable 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 tab tape connected to both left and right sides of a back side portion, the tab tape provided with a convex member or a concave member of a mechanical fastener, and the ventral side portion of the mechanical fastener. The disposable diaper provided with a fastening portion for engaging / fastening the convex member or the concave member of the present invention. More specifically, the dorsal side portion can be securely fastened to the abdominal side portion without using release paper. , A disposable diaper having a fastener capable of easily and reliably forming a discard shape.

[0002]

2. Description of the Related Art Conventionally, a liquid-permeable top sheet, a liquid-impermeable back sheet,
And, having an absorbent body interposed between these two sheets, a ventral side portion located on the ventral side of the wearer and a back side portion located on the back side are formed when worn, and both sides of the back side portion are formed by mechanical fasteners. BACKGROUND ART Disposable diapers that are worn by attaching their parts to the ventral side are well known. In such a disposable diaper, the convex member or the concave member of the mechanical fastener is provided on the tab tape connected to the left and right sides of the back side, and the convex member or the concave member of the mechanical fastener is engaged and A fastening portion to be fastened is provided on the ventral side. In such a disposable diaper, compared with a disposable diaper in which the back side is fixed to the abdomen by an adhesive fastener, the fastening force is less likely to decrease due to contamination by powder, etc. There is no risk that the back sheet on the abdominal part will be torn without separating the parts.
And so on. However, in such a conventional disposable diaper, the tab tape cannot be fixed to any portion other than the fixing portion, and at the time of discarding, a so-called discarding shape in which the absorbed liquid or the like is rolled up so as not to get inside. There is a drawback that it cannot be retained.

In order to solve the above-mentioned drawbacks, conventionally,
JP-A-2-4372 and JP-A-2-4373 propose a technique in which a tab tape is provided with both a mechanical fastener portion functioning as a mechanical fastener and an adhesive fastener portion functioning as an adhesive fastener.
That is, in Japanese Patent Laid-Open No. 23722/1992, FIG.
As shown in (a), the tab tape 113 is further extended from the mechanical fastener portion 113a to extend the mechanical fastener portion 11a.
Adhesive fastener part 11 with adhesive applied on the same side as 3a
3b is provided, the adhesive fastener parts 113b are overlapped with each other, and a technique of further folding the adhesive fastener parts 113b on the mechanical fastener part 113a, or as shown in the attached FIG.
Has been proposed in which only the adhesive fastener portion 213b is provided, and the mechanical fastener piece 213a is releasably attached to the adhesive fastener portion 213b. Further, in Japanese Patent Laid-Open No. 2-4373, as shown in the attached FIG. 6, a mechanical fastener portion 313a is formed on one surface of the tab tape 313.
And the adhesive fastener portion 313b are both provided, and when worn, the mechanical fastener portion 313a and the adhesive fastener portion 313 are provided.
A technique of fixing both of b to the ventral side has been proposed.

The tab tape 11 shown in the attached FIG.
In the technique of further extending 3 from the mechanical fastener portion 113a to provide the adhesive fastener portion 113b, the tab tape 113 is stretched to expose the adhesive fastener portion 113b at the time of disposal as shown in FIG. 4 (b). By adhering the adhesive fastener portion 113b to a back sheet (not shown) which is the outer side in the discard shape,
The discarded shape can be retained. However, since the portion provided with the mechanical fastener 113a is disposed on the back sheet side and is not fixed to the back sheet (not shown) when it is made into the discard shape, the tab tape 113 is fixed to the back sheet (not shown). However, there is a problem that it is difficult to maintain the discarded shape well. Also shown in the attached FIG.
The mechanical fastener piece 213 is attached to the adhesive fastener portion 213b.
In the technique of releasably attaching a, the mechanical fastener piece 213a is peeled off at the time of disposal or the like so that the adhesive fastener portion 213 is removed.
It is possible to expose b and hold the discard shape by the adhesive fastener portion 213b. However, there is a problem that it takes time to discard the mechanical fastener piece 213a.

Further, the tab tape 31 shown in the attached FIG.
In the technique of providing both the mechanical fastener portion 313a and the adhesive fastener portion 313b on one surface of 3, the adhesive fastener portion 313b is directly attached to the paired tab tape 313 or the back sheet (not shown) at the time of disposal. It can be adhered to retain the discarded shape. However, since the adhesive fastener part 313b is used for wearing, the fastening force becomes weak due to contamination by powder or the like, and the abdominal part does not separate from the dorsal part during peeling and the back sheet of the abdominal part is torn and re-engaged. However, there is a problem that the drawbacks of the disposable diaper in which the back side portion is fixed to the abdominal side portion by the adhesive fastener remain unsolved.

Therefore, an object of the present invention is to provide a disposable diaper having a fastener whose back side can be securely fixed to the abdominal side, which does not require a release paper, and which can easily and surely form a discard shape. To provide.

[0007]

SUMMARY OF THE INVENTION The present invention has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body interposed between these sheets, and is a ventral side of the wearer when worn. A ventral side portion located on the back side and a back side portion located on the back side are formed, tab tapes are connected to both left and right sides of the back side portion, and the tab tape is provided with a convex member or a concave member of a mechanical fastener. In the disposable diaper in which the convex portion or the concave member of the mechanical fastener is engaged and fixed to the ventral side portion, in the disposable diaper, the convex member or the concave member of the mechanical fastener is Provided on the back sheet side of the tab tape, in the vicinity of the end of the surface of the tab tape on the side opposite to the surface provided with the convex member or the recessed material of the mechanical fastener, an adhesive portion coated with an adhesive is provided, The above-mentioned tab table provided with an adhesive section The said portion of the non-adhesive portion of the surface of the flop, the PSA unit is provided to be adhesive portion releasably be bonded without loss of tackiness of the adhesive, the adherend portion, upper
The adhesive part can be peeled off without losing the adhesiveness of the adhesive.
As an adhesive after the adhesive is peeled off and the adhesive is peeled off
A functional self-adhesive is applied, the tab tape is bent between the adhesive portion and the adhered portion to adhere the adhesive portion to the adhered portion, and the convex member or concave member The above object is achieved by providing a disposable diaper characterized by being arranged on the surface sheet side.

The present invention has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body interposed between these sheets, and is an abdominal portion located on the abdomen of the wearer when worn. And a back side portion located on the back side is formed, tab tapes are connected to both left and right side portions of the back side portion, the tab tape is provided with a convex member or a recess member of a mechanical fastener, and the ventral side portion is provided. In a disposable diaper provided with a fastening portion to which the convex member or the concave member of the mechanical fastener is engaged and fixed, the convex member or the concave member of the mechanical fastener is provided on the back sheet side of the tab tape. In the surface of the tab tape on the side opposite to the surface provided with the convex member or the concave member of the mechanical fastener, an adhesive portion coated with an adhesive is provided, and the surface sheets on both left and right sides of the back side portion are provided. On the side, attach the adhesive part The provided the adhesive portion that can be releasably adhered without loss of tackiness agents, the adherend portion, the viscosity
The adhesive part can be peeled off without losing the adhesiveness of the adhesive.
Functions as an adhesive after wearing and peeling off the adhesive part
Self-adhesive is applied, the tab tape is bent in the vicinity of the side edge of the back side portion to adhere the adhesive portion of the tab tape to the adhered portion of the back side portion, the convex member or The object is achieved by providing a disposable diaper characterized in that a concave member is arranged on the surface sheet side.

[0009]

The present invention provides the disposable diaper according to claim 1 or 2, wherein the adhesive part and the adhered part are releasably adhered to each other with a separating force of 25 to 500 g / 25 mm width. By doing so, the above object is achieved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the disposable diaper of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view showing a disposable diaper of a first embodiment of the present invention, FIG. 2 is a cross-sectional view showing a tab tape of the disposable diaper of FIG. 1, and FIG. FIG. 3B shows a state in which the adhesive fastener part is peeled from the adhered part, and FIG.

The disposable diaper 10 of this embodiment is shown in FIG.
As shown in FIG. 3, the liquid-permeable top sheet 11, the liquid-impermeable back sheet 12, and an absorbent body (not shown) interposed between these sheets are provided, and are placed on the abdomen of the wearer when worn. A ventral side portion A and a back side portion B located on the back side are formed. The tab tape 13 is connected to both right and left sides of the back side portion B, and the tab tape 13 has a convex member 13a of the mechanical fastener as a convex member of the mechanical fastener or a concave member.
Is provided, and the ventral side portion A is provided with a fastening portion 14 to which the convex member 13a of the mechanical fastener as the convex member or the concave member of the mechanical fastener is engaged and fixed. . These configurations are the same as those of the known prior art.

Thus, the disposable diaper 10 of this embodiment
Then, as shown in FIGS. 2A and 2B, the convex member 13 a of the mechanical fastener as the convex member or the concave member of the mechanical fastener is replaced with the back sheet 1 of the tab tape 13.
The adhesive fastener section 13b coated with an adhesive is provided near the end of the surface of the tab tape 13 opposite to the surface provided with the convex member 13a. In addition, the adhesive fastener portion 13b can be peelably adhered to a portion of the surface of the tab tape 13 provided with the adhesive fastener portion 13b other than the adhesive fastener portion 13b without losing the adhesive property of the adhesive. 2A, the tab tape 13 is bent between the adhesive fastener portion 13b and the adhered portion 13c so that the adhesive fastener portion 13b is adhered to the adhered portion 13c. And the convex member 13a is arranged on the surface sheet 11 side.

To explain this embodiment in detail, one end of the tab tape 13 is fixed to both left and right sides of the back side portion B. And the back sheet 1 of this tab tape 13
The convex member 13a of the mechanical fastener is fixed to about half of the other end side of the portion extending from the back side portion B of the surface on the second side. Also, the back side portion B on the opposite side of the tab tape 13
The release agent is applied to one half of the extended portion to form the adhered portion 13c, and the other half of the portion is coated with the adhesive to form the adhesive fastener portion 13b. There is. In addition, the disposable diaper 1 of the present embodiment described above
On the ventral side portion A of 0, the concave portion material of the mechanical fastener is fixed and the fastening portion 14 is formed.

The release agent is used for the adhesive fastener 13
b can be releasably adhered without losing the adhesiveness of the pressure-sensitive adhesive, and functions as a pressure-sensitive adhesive after the pressure-sensitive adhesive fastener portion 13b is peeled off. For example, octadecyl isocyanate type can be used. Then, the adhered portion 1
3c is, in particular, a tab of a silicone resin type tape 1
It is preferable that it is formed by applying and drying on No. 3 after heating.
As the above-mentioned pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a silicone-containing rubber-based pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive, a silicone-containing acrylic pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, or the like is used. Examples of the rubber adhesive include natural rubber adhesives, styrene-butadiene adhesives, polyisobutyl adhesives, and the like. Examples of the silicone-containing rubber-based pressure-sensitive adhesive include pressure-sensitive adhesives obtained by adding or adding silicone to the rubber-based pressure-sensitive adhesive. Examples of the acrylic pressure-sensitive adhesive include general pressure-sensitive adhesives containing an acrylic polymer as a main component. Examples of the silicone-containing acrylic pressure-sensitive adhesive include pressure-sensitive adhesives obtained by adding or adding silicone to the above acrylic pressure-sensitive adhesive. Examples of the silicone-based pressure-sensitive adhesive include general silicone-based pressure-sensitive adhesives containing silicone rubber as a main component.

The adhesive fastener portion 13b and the adhered portion 1
The peeling force from 3c is 100 g / 25 mm width.
In addition, the peeling force between the adhesive fastener portion 13b and the adhered portion 13c is determined by making the adhesive fastener portion 13b of the tab tape 13 and the adhered portion 13c adhere to each other with a width of 25 mm and pressing the 1 kg roller back and forth once. 2 at 40 ° C and 80% RH
Store for 4 hours, and after 30 minutes at room temperature,
Under 5% RH environment, chuck distance 50mm, pulling speed 3
It is a load obtained by performing a 180 ° peel test with a Tensilon universal tensile tester at 00 mm / min.

The disposable diaper 10 of the present embodiment having the above-described structure, the wear of the convex member 13 a is engaged and fixed to the fastening part 14. The waste or the like, as shown in FIG. 2 (b), the adhesive fastener part 13b pull the end of the tab tape 13 is peeled from the adhesive portion 13c, the adhesive fastener part 13b and the adhesive section 13c front surface sheet 11 Exposed on the side
Place it. Then, the disposable diaper 10 is rolled up with the back sheet 12 side facing outward to form a discard shape, and in this state, if the adhesive fastener portion 13b and the adhered portion 13c are adhered to the back sheet 12, the discard shape is changed. Retained.

Thus, the disposable diaper 1 of this embodiment
According to 0, since the adhesive fastener portion 13b is not used because it is covered with the adhered portion 13c when worn, the drawbacks of the adhesive fastener when worn are eliminated and the advantages of the mechanical fastener are fully exhibited. Further, according to the disposable diaper 10 of the present embodiment, the adhesive fastener portion 13
Since b is covered by the adhered portion 13c formed on the tab tape 13, there is no need to dispose of release paper or the like when exposing the adhesive fastener portion 13b at the time of disposal.

Further, according to the disposable diaper 10 of the present embodiment, about half of the portion extending from the back side portion B of one surface of the tab tape 13 is the adhesive fastener portion 13b, so that the tab tape is used. 13 can be easily and reliably fastened to the back sheet 12 to hold the discarded shape. Further, particularly according to the disposable diaper 10 of the present embodiment, almost all of the surface of the tab tape 13 on the side having the adhesive fastener portion 13b is the adhered portion 13c except the adhesive fastener portion 13b. 1
After peeling off 3b, since it is adhered to the back sheet 12 together with the adhesive fastener portion 13b, the discarded shape can be held more easily and surely.

Next, a second embodiment of the disposable diaper of the present invention will be described. In this embodiment, the same members as those of the disposable diaper 10 of the first embodiment shown in FIGS. 1 and 2 described above are designated by the same reference numerals and the description thereof will be omitted. FIG. 3 is a front view of a main part of a disposable diaper according to a second embodiment of the present invention. (A) shows a state in which an adhesive fastener part is adhered to a release sheet, (b) shows the adhesive fastener part from the release sheet. It shows a peeled state.

In the disposable diaper 20 of this embodiment, as shown in FIG. 3 (a) or 3 (b), substantially the entire portion of the tab tape 23 extending from the back side portion B of the back sheet 12 side, The convex member 23a of the mechanical fastener is fixed, and the adhesive is applied to almost the entire surface on the opposite side to form the adhesive fastener portion 23b. Further, a release sheet 25 as an adhered portion is fixed to the surface sheet 11 side on both right and left sides of the back side portion B, and a release agent is applied to the surface of the release sheet 25, and the tab tape 23 is adhered. No section is provided. Then, as shown in FIG.
The tab tape 23 is bent in the vicinity of the side edge of the back side portion B, and almost the entire portion of the tab tape 23 extending from the back side portion B is adhered to the release sheet 25.
Is arranged on the surface sheet 11 side. The configuration other than these is the same as that of the first embodiment described above.

The disposable diaper 20 of this embodiment can also obtain the same operation and effect as those of the above-described first embodiment. Furthermore, the disposable diaper 20 of this embodiment
According to this, since the left and right side portions of the back side portion B are fastened to the fastening portion 14 via the tab tape 23 when worn, the back side portion B is more reliably engaged and fastened to the belly side portion A. Be worn. Further, according to the disposable diaper 20 of the present embodiment, the release sheet 25 is provided on both sides of the back side portion B in the state of the discard shape.
Since it is adhered onto the back sheet 12 via the, the discarded shape is held more easily and surely.

The present invention is not limited to the above-described embodiments, but can be modified as appropriate without departing from the spirit of the present invention. For example, the adhered portion 13c and the release sheet 25 may be formed by spraying a thin film instead of applying the above-mentioned adhesive to form the thin film . Further , the peeling force between the adhesive fastener portion 13b and the adhered portion 13c or between the adhesive fastener portion 23b and the release sheet 25 is not limited to 100 g / 25 mm width, In order to prevent the adhesive portion 13c or the adhesive fastener portion 23b and the release sheet 25 from peeling off during wearing of the disposable diaper and easily peeling off when forming a discard shape, the width is 25 to 500 g / 25 mm. Is desirable. Further, when a non-woven fabric is arranged on the abdominal portion A, the non-woven fabric functions as the fastening portion 14, so that the concave member of the mechanical fastener does not need to be specially provided. Needless to say, the specific shape, size, etc. of each member are not limited to those in the above-described embodiment.

[0024]

As described above, according to the disposable diaper according to the present invention, the back side can be securely fastened to the abdomen by the fastener, the release paper is not required, and the discard shape is easy and reliable. Can be formed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a disposable diaper according to a first embodiment of the present invention.

2 is a cross-sectional view showing a tab tape of the disposable diaper of FIG. 1, (a) showing a state in which an adhesive fastener part is adhered to an adhered part, (b) peeling the adhesive fastener part from the adhered part. It shows the state.

FIG. 3 is a front view of a main part of a disposable diaper according to a second embodiment of the present invention, in which (a) is a state in which an adhesive fastener part is adhered to a release sheet, and (b) is an adhesive fastener part in a release sheet. It shows a state of being peeled from.

FIG. 4 is a cross-sectional view showing a tab tape as an example of a conventional disposable diaper, (a) showing a state when worn,
(B) shows the state at the time of disposal.

FIG. 5 is a cross-sectional view showing a tab tape of another example of the prior art disposable diaper.

FIG. 6 is a main part front view showing another example of the conventional disposable diaper.

[Explanation of symbols]

10 disposable diapers 11 Surface sheet 12 Back sheet 13 tab tape 13a convex member 13b Adhesive fastener part 13c Adhesive part 14 Fastening part 20 disposable diapers 23 tab tape 23a convex member 23b Adhesive fastener part 25 Release sheet A ventral side B back side

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Laid-Open No. 2-5946 (JP, A) Japanese Patent Laid-Open No. 50-109043 (JP, A) Actual Flat No. 7-22725 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) A61F 13/15-13/84 A61F 5/44

Claims (3)

(57) [Claims] 1. An abdomen and a back located on the abdominal side of a wearer when the wearer has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body interposed between these sheets. A back side portion located on the side is formed, tab tapes are connected to both left and right side portions of the back side portion, the tab tape is provided with a convex member or a concave member of a mechanical fastener, and the ventral side portion, The convex member or concave member of the mechanical fastener is engaged.
In a disposable diaper provided with a fastening portion to be fastened, the convex member or concave member of the mechanical fastener is provided on the back sheet side of the tab tape, and the convex member or concave member of the mechanical fastener is provided. An adhesive part coated with an adhesive is provided in the vicinity of the end of the surface of the tab tape on the side opposite to the adhesive surface, and the adhesive part is provided on a part other than the adhesive part of the surface of the tab tape provided with the adhesive part. Is provided with a pressure-sensitive adhesive portion that can be peelably bonded without losing the pressure-sensitive adhesiveness of the pressure-sensitive adhesive, and the pressure-sensitive adhesive portion loses the pressure-sensitive adhesiveness of the pressure-sensitive adhesive.
It adheres so that it can be peeled without losing it, and the adhesive part is peeled off.
After that, a self-adhesive that functions as an adhesive is applied, and the tab tape is bent between the adhesive portion and the adhered portion to adhere the adhesive portion to the adhered portion, and the convex portion A disposable diaper in which a member or a recessed material is arranged on the surface sheet side. 2. An abdominal part and a back which are located on the abdominal side of the wearer when wearing and have a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorber interposed between these sheets. A back side portion located on the side is formed, tab tapes are connected to both left and right side portions of the back side portion, the tab tape is provided with a convex member or a concave member of a mechanical fastener, and the ventral side portion, The convex member or concave member of the mechanical fastener is engaged.
In a disposable diaper provided with a fastening portion to be fastened, the convex member or concave member of the mechanical fastener is provided on the back sheet side of the tab tape, and the convex member or concave member of the mechanical fastener is provided. The side of the tab tape on the opposite side of the back side from which the pressure sensitive adhesive is applied, and the pressure sensitive adhesive is made to lose the tackiness of the pressure sensitive adhesive on the surface sheet side of the left and right sides of the back side. A tacky part that can be peeled off is provided without removing the tackiness of the tacky part.
It adheres so that it can be peeled without losing it, and the adhesive part is peeled off.
After that, a self-adhesive agent that functions as an adhesive is applied, and the tab tape is bent near the side edge of the back side portion, and the adhesive portion of the tab tape is attached to the adhered portion of the back side portion. A disposable diaper, characterized in that the convex member or the concave member is arranged on the surface sheet side by being adhered. 3. The pressure-sensitive adhesive portion and the pressure-sensitive adhesive portion are 25-5.
The disposable diaper according to claim 1 or 2 , wherein the disposable diaper is detachably bonded with a peeling force of 00g / 25mm width.