JPH11169404A - Paper diaper provided with fastening tape with secondary adhesion part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper diaper provided with a fastening tape whose adhesion power is not easily lowered by the sticking of a foreign matter or the like to an adhesive surface. SOLUTION: This paper diaper is put on the crotch part of a human body and the fastening tape whose one end part 5 is fixed is provided on both side edge parts of the rear side part of the paper diaper. In the paper diaper worn by freely attachably and detachably adhering the other end part of the fastening tapes to the front side part of the paper diaper, on the adhesion surface of the fastening tape, a recessed secondary adhesion part 9 pushed out by being pressurized from the opposite surface of the adhesive surface and freely attachably and detachably adhered to the surface to be adhered is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper to be worn using a fastening tape, and more particularly, to one in which the adhesive strength of the fastening tape is hardly impaired.

[0002]

2. Description of the Related Art Currently, pants-type disposable diapers and tape-stopping disposable diapers using a fastening tape are widely used. Among them, the tape-stopping type disposable diaper (1) shown in FIG. 1 is provided with fastening tapes (2) and (2) on both outer edges of the outer surface of the long main body when applied to the crotch of the human body. Of the tapes (2) and (2) are folded back toward the inner surface of the main body to adhere to the release tapes (3) and (3) fixed to the inner surface. . When the disposable diaper (1) is worn, the main body of the disposable diaper is applied to the crotch portion, and the adhesive surfaces of the fastening tapes (2) and (2) are peeled off from the release tapes (3) and (3) to remove the adhesive surface. (1) is detachably attached to a frontal tape (4) fixed to the outer surface of the front side and worn.

[0003]

In order to sufficiently exhibit the absorbing performance of the paper diaper, the tape-stopping type diaper is designed to prevent the diaper from shifting left and right when worn.
In addition, it is necessary to wear the gathers in an appropriate stretched state, and this adjustment is performed depending on the position of the fastening tape to the frontal tape when worn. However, when the wearer wears the diaper body lying on his back, the diaper body is not easily moved because the diaper body is laid on the buttocks, and the fastening tape that has been pasted once for positioning may be reattached. However, between the fastening tape and the frontal tape, there has been a problem that since the adhesive strength sufficient to fix the diaper main body is developed, it is difficult to peel off the fastening tape.

[0004] Further, when changing the disposable diaper, the processing of the used diaper and the positioning of the diaper to the baby with active movement are performed almost at the same time. In addition, while wearing disposable diapers, there are many occasions where the fastening tape is repeatedly adhered to the frontal tape in order to check and replace urine and feces. There is also a problem that the frequency of work is high and the adhesive strength is reduced.

[0005] The tape used for fixing baby paper diapers has an adhesive surface having a size of, for example, 2.5 cm wide.
The length is about 3.5 cm, and the non-adhesive knob at the tip is 5
mm. For this reason, the fingertip may adhere to the adhesive surface many times during use.

[0006] In addition, when changing the disposable diaper, there are cases where powders and oils are used for the purpose of protecting the skin of children, and cosmetics are sometimes adhered to mother's fingers by skin care or the like. For this reason, during the process of peeling the fastening tape from the release tape and attaching it to the predetermined position on the frontal tape, the fibers or powder from the clothing may fall off due to the act of accidentally sticking clothes or skin to the adhesive surface of the tape or touching it with a fingertip. In some cases, oils may adhere to the adhesive surface. When powder, oils, fibers and the like adhere to the adhesive surface in this manner, there is a possibility that the adhesive force is significantly reduced and the diaper cannot be used.

Recently, a diaper using a so-called "magic tape" has been put on the market as a mechanical fixing means that does not cause a decrease in bonding strength due to the attachment of a foreign substance. However, it is expensive and is difficult to roll and dispose. There are problems such as the necessity of separately providing means.

[0008]

SUMMARY OF THE INVENTION In view of the above, the present invention has been developed as a result of a study to develop a disposable diaper having a fastening tape which does not cause a large decrease in the adhesive force even if foreign substances which inhibit the adhesive force adhere to the adhesive surface. It is.

That is, the present invention relates to a disposable diaper to be applied to the crotch of a human body, wherein a fastening tape having one end fixed to both side edges of a rear portion of the disposable diaper is provided. In a disposable diaper to be worn by detachably adhering to a front portion of the disposable diaper, a concave shape which is extruded by being pressed from an opposite surface of the fastening tape to an adhesive surface of the fastening tape and is detachably adhered to an adhered surface. The present invention is a disposable diaper provided with a fastening tape, wherein the secondary adhesive portion is provided. It is effective to form a large number of secondary adhesive portions on the adhesive surface. It is also effective to form a convex secondary portion on the adhesive surface by forming a concave portion other than the convex portion, or to form a large number of convex portions on the adhesive surface. It is also good to provide a secondary adhesive strip on the adhesive surface, and a large number of secondary adhesive strips extending in the width direction of the adhesive surface are spaced apart in the longitudinal direction of the adhesive surface, or other secondary adhesive strips are provided from one end of the adhesive surface. Forming a wavy surface toward the end is also effective.

By providing a concave secondary adhesive portion on the adhesive surface in this manner, the use of a disposable diaper inadvertently reduces skin and clothing compared to a conventional fastening tape having an adhesive surface that is a uniform flat surface. In this case, the adhesion of the foreign matter remains in the convex region of the adhesive surface, and the adhesive force of the surface of the secondary adhesive portion is maintained. That is, even when the convex surface area is in contact with the substance that inhibits adhesion and the adhesive surface is contaminated, the secondary adhesive portion is not easily contaminated, and the fastening tape is pressed from the anti-adhesive surface side to form the secondary adhesive portion. The surface is extruded to the frontal tape surface to develop adhesive strength. At this time, the secondary adhesive portion may have one relatively large area, but it is more effective to provide a large number of small adhesive portions.

Since the secondary adhesive portion may be recessed from the surface of the adhesive surface, by forming a large number of convex portions on the adhesive surface, an area of the adhesive surface having a relatively low height other than the convex portion can be formed. It can also be a secondary adhesive part. Further, in order to form the secondary adhesive portion, an uneven surface may be provided only on the surface of the adhesive surface, but the fastening tape itself may be subjected to an uneven process as described below.

That is, for example, by embossing a fastening tape obtained by applying an adhesive to a non-stretched polypropylene film and attaching an uneven surface to the tape main body, the coating position of the adhesive is adjusted and the coating thickness is adjusted. It can be obtained easily without depending on adjustment or the like. In this case, the convex surface as viewed from the film side becomes the secondary adhesive portion. Adjustment of the adhesive force of the secondary adhesive portion is performed by changing the degree of the pressing force from the film surface opposite to the adhesive surface to adjust the area where the surface of the secondary adhesive portion adheres to the frontal tape. Just do it.

The embossing of the fastening tape is described in Japanese Patent Application Laid-Open No. 1-162804, but is different in terms of fine irregularities and effects. (Constitution) The surface of the polyolefin layer is jagged at about 500 times and has a height of 2 μm. -Peeling force 175 N / m (450 g / 25 mm) or more. -The unevenness is at least 1/2 or more of the fixed surface. -The surface unevenness is composed of a plurality of peaks, and the average distance between adjacent peaks is less than 5 times the average height of the peaks. -Polyolefin layer is polypropylene, propylene + ethylene, etc. (Effect) ・ High peel resistance is given at both high and low speeds, and at the same time, it can be peeled smoothly at high speed.

[0014]

Embodiments of the present invention will be described below.

Example 1 A disposable diaper having a fastening tape as shown in FIG. 2 was produced. The base end (5) of the fastening tape is fixed to the paper diaper main body, and the front end of the adhesive surface is folded back to form a knob (6) for peeling off from the release tape. A plurality of recesses (7) are provided on the adhesive surface from the film surface side of the tape by embossing to form a plurality of protrusions (8) corresponding to the recesses (7) on the adhesive surface side. The concave portion of the adhesive surface other than the convex portion (8) was used as a secondary adhesive portion (9).

As shown in FIG. 3, the fastening tape (2a) of the present invention has a pressure-sensitive adhesive surface adhered to a frontal tape (4) and is worn with a disposable diaper. When the adhesive force is weakened due to the adhesion of foreign matter to the surface, as shown in FIG. 3, the fastening tape (2a) is pressed with a finger from the film surface to push out the secondary adhesive portion (9), and the second adhesive portion (9) is pushed out. The surface of the next adhesive portion (9) is further adhered to the frontal tape (4) to increase the overall adhesive strength. Also, when the fastening tape is peeled off from the frontal tape and then re-adhered, a higher adhesive strength can be obtained by extruding the secondary adhesive portion and adhering it to the frontal tape as described above. The shape of the convex portion (8) (corresponding to the concave portion (7) on the film side) provided on the adhesive surface may be circular as shown in FIG. 4, or may be rhombic or rectangular as shown in FIG. Any shape may be used.

(Example 2) As shown in FIG. 6, a large number of rectangular convex portions (10) are formed on the film surface side of the fastening tape (2b), and the adhesive surface side corresponding to the convex portions (10) is formed. Embossing was performed so that the rectangular recess became the secondary adhesive portion (9). When the fastening tape (2b) having such a structure is pressed with a finger on the film surface, the convex portion (10) is pressed and the secondary adhesive portion (9) is extruded, so that the adhesive strength of the entire adhesive surface is maintained. Leads to improvement.

(Example 3) As shown in FIG. 7, the entire adhesive surface is processed into a wavy shape in the longitudinal direction, so that a large number of concave secondary adhesive strips (11) in the width direction are formed on the adhesive surface in the longitudinal direction. An isolated fastening tape (2c) was made. By pressing the film surface side of the fastening tape (2c) with a finger, the secondary adhesive strip (11) is pushed out, and the effect of the present invention can be obtained. Note that the wavy shape may be provided only on at least the adhesive surface. Alternatively, the secondary adhesive strip 11 may have a rectangular cross section as shown in FIG. Further, the fastening tape (2) shown in FIG.
In c), when sticking to the frontal tape, when the knob (6) is gripped with a finger and pulled strongly, the adhesive area is deformed from a wavy shape to a substantially flat shape. The force can be increased, and it can be returned to the original wave shape by releasing the knob (6).

[0019]

As described above, according to the present invention, even if the adhesive surface of the fastening tape is inadvertently attached to the skin or clothing when using a disposable diaper, the foreign matter remains in the area of the convex portion of the adhesive surface and the secondary adhesive portion. Is maintained. That is, even when the convex surface of the adhesive surface comes into contact with a substance that inhibits the adhesion and the adhesive surface is contaminated, the concave secondary adhesive portion is hardly contaminated, and the secondary adhesive is pressed by pressing the fastening tape from the film surface side. The surface is extruded onto the surface to be adhered to the frontal tape, and develops adhesive strength. Therefore, even if the adhesive strength is reduced by touching the adhesive surface of the fastening tape by hand, the adhesive strength is recovered or improved by pressing from the film side of the fastening tape when re-adhering, so that the fastening tape cannot be used. This has the effect of reducing the frequency of changing disposable diapers.

[Brief description of the drawings]

FIG. 1 is a plan view showing a tape-stop type paper diaper.

FIG. 2 is a perspective view showing a fastening tape used in Example 1 of the disposable diaper of the present invention.

FIG. 3 is an explanatory view showing how to use the fastening tape.

FIG. 4 shows another example of the fastening tape used in Example 1 of the disposable diaper of the present invention, wherein (a) is a perspective view,
(B) is a sectional view taken along line AA of (a).

5 (a) is a perspective view, and FIG. 5 (b) is a sectional view taken along the line BB of FIG. 5 (a).

6A and 6B show a fastening tape used in Example 2 of the disposable diaper of the present invention, wherein FIG. 6A is a perspective view and FIG. 6B is a cross-sectional view taken along line CC of FIG.

FIG. 7 is a perspective view showing a fastening tape used in Example 3 of the disposable diaper of the present invention.

FIG. 8 is a perspective view showing another example of the above fastening tape.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tape-stopping type diaper 2 Fastening tape 3 Release tape 4 Frontal tape 5 Base end 6 Knob 7 Film side recess 8 Adhesive side convex part 9 Secondary adhesive part 10 Film side convex part 11 Secondary adhesive strip part

Claims (7)

[Claims] 1. A disposable diaper to be applied to a crotch part of a human body, wherein a fastening tape having one end fixed to both side edges of a rear portion of the disposable diaper is provided, and the other end of the fastening tape is connected to the front of the disposable diaper. In a disposable diaper to be worn by being removably adhered to a portion, a concave secondary diaper which is extruded by being pressed from the opposite surface of the fastening tape to the adhesive surface of the fastening tape and is detachably adhered to the surface to be adhered. A disposable diaper provided with a fastening tape, wherein an adhesive portion is provided. 2. A disposable diaper provided with a fastening tape according to claim 1, wherein a number of secondary adhesive portions are recessed on the adhesive surface. 3. A disposable diaper provided with a fastening tape according to claim 1, wherein a convex portion is formed on the adhesive surface so that a portion other than the convex portion is a concave secondary adhesive portion. 4. A disposable diaper provided with a fastening tape according to claim 3, wherein a number of convex portions are formed on the adhesive surface. 5. The method according to claim 1, wherein a secondary adhesive strip is provided on the adhesive surface.
A disposable diaper provided with the fastening tape according to the above. 6. A disposable diaper provided with a fastening tape according to claim 5, wherein a plurality of secondary adhesive strips extending in the width direction of the adhesive surface are spaced apart in the longitudinal direction of the adhesive surface. 7. A disposable diaper provided with a fastening tape according to claim 6, wherein a wavy surface is formed from one end to the other end of the adhesive surface.