JPH0626836U - Disposable diaper - Google Patents

Abstract

(57) [Summary] [Purpose] A disposable diaper equipped with a fastening tape that can be attached and removed repeatedly. [Structure] A fastener tape, one end of which is fixed to a back sheet and the other end of which is a free end having an adhesive surface, which is temporarily attached to a release tape which is fixed to a top sheet near the side of the rear part of the diaper. A disposable diaper having a structure, wherein a pressure-sensitive adhesive layer at the free end is provided with a pressure-sensitive adhesive layer that can be attached to and detached from the back sheet.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disposable diaper. More specifically, it relates to a disposable diaper provided with a fastening tape which can be repeatedly attached and detached on a back sheet.

[0002]

[Prior art]

 As shown in FIGS. 6 and 7, a conventional disposable diaper has a fastener tape structure for joining the waist and both ends to each other. Generally, the fastening tape 7 has one end fixed to the backsheet 2 at both ends around the waist of the rear body 6 of the diaper and the release tape fixed to the topsheet 3 on the opposite side (not shown). The free end of the fastening tape is temporarily attached to the back of the diaper, and the free end of the fastening tape is peeled off from the release tape when the diaper is attached, and the back end of the diaper front body 5 is adhered to the back sheets at both ends. Both ends of the front and back of the diaper around the waist are connected.

However, as a backsheet of a diaper, a relatively thin plastic material such as a thin sheet of polyethylene is often used as a backsheet for the diaper because it is necessary to be flexible and economical. Once the fastening tape was adhered to the back sheet of the diaper body, it was difficult to remove the fastening tape without breaking the back sheet. Therefore, once the fastening tape was fixed on the back sheet, it was almost impossible to change the position of the fastening tape to adjust the mounting condition of the diaper. Further, if the fastening tape is strongly pulled by the movement of the human body or the like after the fastening tape is adhered, the back sheet of the diaper body may be torn.

Therefore, a paper diaper has been proposed in which a release paper or the like is previously attached to a position corresponding to the fastening tape adhesion on the back sheet of the diaper body, and the release paper and the fastening tape are detached from each other. However, even in the case of this paper diaper, once the release paper is pasted on the back sheet of the paper diaper, it is impossible to change the pasting position, and therefore the wearing condition of the paper diaper cannot be sufficiently adjusted. It was.

There is also a method of weakening the adhesive strength of the fastening tape, but since the conventional fastening tape base material is provided with an adhesive layer having the same adhesive strength at both the fixed portion and the free end, it is possible to use it while using the diaper. There is a risk that the fastening part of the fastening tape will peel off from the attached backsheet, or the adhesion between the free end of the fastening tape and the backsheet will peel off, making it difficult to balance the strength of the backsheet.

In order to solve the above problem, as shown in FIGS. 6 and 7, a reinforcing sheet 13 extending in the width direction of the front body portion is attached to the outer surface of the front body portion of the diaper body, and the diaper is attached. By occasionally receiving the adhesive layer at the free end of the fastening tape fixed to the rear body side edge of the diaper body, it is possible to repeatedly detach and fix the fixing position of the fastening tape. However, since the size of the above-mentioned reinforcing sheet is generally proportional to the size of the diaper, the area of the reinforcing tape used increases as the size of the diaper increases, resulting in a larger adhesive area between the fastening tape and the reinforcing tape. On the other hand, there was a problem that the product cost of the reinforcing tape increased.

[0007]

[Problems to be solved by the device]

 The purpose of the present invention is to make it possible to repeatedly attach and detach both front and rear waist circumferences of a diaper without providing a reinforcing sheet without damaging the back sheet.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention comprises an adhesive layer at the free end of the fastening tape made of an adhesive having an adhesive force capable of being re-adhered to a back sheet. The present invention comprises a topsheet, a backsheet, and an absorbent core interposed between the two sheets, and one end is fixed to the backsheet as a fixed end, and the other end is fixed. As a free end with an adhesive surface, it is detachably temporarily attached to the release surface of the release tape fixed to the top sheet near the side of the rear part of the diaper, and when wearing the diaper, the waist of the front part of the diaper is attached. A disposable diaper having a fastener tape structure which is used by adhering to both ends of the periphery, wherein a pressure-sensitive adhesive layer detachable from the back sheet is provided on the pressure-sensitive adhesive surface of the free end. To do. Further, in the diaper of the present invention, for example, when the adhesive force of the adhesive at the free end is set to be smaller than the conventional adhesive force, there is a risk that the free end and the backsheet are peeled off during use of the diaper. However, this problem can be solved by increasing the adhesion area of the fastening tape to be larger than the conventional adhesion area.

As the base material of the fastening tape used here, for example, a polypropylene film, a polyethylene film or the like which is commonly used can be used, and the adhesive used is also rubber-based or acrylic There is no particular limitation as long as it is a commonly used type such as ethylene-based or ethylene vinyl acetate-based.

As a method of providing different pressure-sensitive adhesive layers on the fixed end and the free end in the same tape, the first pressure-sensitive adhesive is pattern-coated on a predetermined portion and the second pressure-sensitive adhesive is applied on the uncoated portion. Any manufacturing method such as a turn coating method or a method in which the first adhesive is applied on the entire surface and a predetermined portion is pattern coated with the second adhesive may be used. Furthermore, it is also possible to change the adhesive force by changing the coating amount of the same adhesive to obtain adhesive layers having different adhesive forces.

[0011]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a plan view of the diaper in a developed state, and FIG. 2 shows a perspective view of the diaper in a mounted state. The diaper 1 is composed of a top sheet 3, a back sheet 2 and an absorbent core 4 interposed between the two sheets, and is constructed by attaching fastener tapes 7 to the back sheets at both ends around the waist of the back body 6. ing. The fastener tapes 7 are bonded to the backsheets at both ends around the waist of the front body 5 to join the both ends around the waist of the front body 5 and the back body 6 of the diaper.

FIG. 3 shows a perspective view of the fastener tape, FIG. 4 shows a side view in which the free end of the fastening tape of FIG. 3 is bent and attached to the release tape 11, and FIG. The side view which peeled the free end part of the tape from the release tape 11 is shown. The fastener tape 7 is a fastening tape base material 8, an adhesive layer 9 for fixing to the backsheet 2 at both waist-end portions of the back body 6 of the diaper provided at one end portion of the tape base material, and the tape. An adhesive layer 10 for connecting the front and rear bodies provided at the free end of the base material; a release tape base material 11 for temporarily attaching the adhesive layer at the free end part of the tape; And a pressure-sensitive adhesive layer 12 for fixing the release tape to the top sheet. The adhesive strength between the pressure-sensitive adhesive layer 10 provided at the free end of the fastening tape and the back sheet at both ends of the front body and the waist is 30 to 2000 g / 25 mm at a peeling speed of 200 mm / min and a peeling angle of 180 °, preferably It is preferably in the range of 50 to 200 g / 25 mm.

[0013]

[Effect of device]

 Since the present invention is configured as described above, the fastening tape can be attached after changing the attaching position by peeling off the fastening tape after attaching the disposable diaper once, and changing the attaching position again. Can be changed to

Further, since it is not necessary to install release paper or a reinforcing sheet at a position corresponding to the fastening tape on the back sheet of the diaper body, the product cost can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view of the diaper of the present invention in a developed state.

FIG. 2 is a perspective view of the diaper of the present invention in a mounted state.

FIG. 3 is a perspective view of a fastening tape.

FIG. 4 is a side view in which the free end portion of the fastening tape of FIG. 3 is temporarily attached to a bent release tape.

5 is a side view in which the free end of the fastening tape is peeled off from the release tape when the tape of FIG. 3 is used.

FIG. 6 is a plan view of a conventional disposable diaper in a developed state.

FIG. 7 is a perspective view of a conventional disposable diaper in a mounted state.

[Explanation of symbols]

1 ... Diaper body, 2 ... Back sheet, 3 ... Top sheet, 4 ... Absorption core, 5 ... Front body, 6 ... Back body, 7 ... Fastener tape, 8 ... Fastening tape base material, 9 ... Provided in fastening tape fixing part Adhesive layer provided, 10 ... Adhesive layer provided on the free end of the fastening tape, 11
... Release tape base material, 12 ... Adhesive layer for fixing the release tape to the top sheet, 13 ... Reinforcing tape

Claims (1)

[Scope of utility model registration request] 1. A top sheet, a back sheet, and an absorbent core interposed between the two sheets, and
One end is fixed to the back sheet as a fixed end, and the other end is a free end having an adhesive surface, and the release tape fixed to the top sheet near the side of the rear portion of the diaper is peeled off. It is temporarily attached to the surface so that it can be peeled off,
In a disposable diaper that has a fastener tape structure that is used by adhering to both waist circumferences of the front body of the diaper when worn, in an adhesive diaper that is detachable from the back sheet on the adhesive surface of the free end A disposable diaper characterized by having layers.