JP2582467Y2 - Sanitary napkin packaging structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary napkin packaging structure which does not have a release paper for protecting an adhesive portion for fixing to a short, and has a sufficient tack force to the short.

[0002]

2. Description of the Related Art Normally, a sanitary napkin is provided with an adhesive for fixing the napkin to shorts and preventing displacement during use, and a release paper for protecting the adhesive. In such sanitary napkins, it is necessary to peel off and discard the release paper at the time of use, so that disposal of the release paper is troublesome, and when the napkin is disposed of in a toilet bowl, the toilet bowl is clogged. is there.

Therefore, various techniques relating to a sanitary napkin packaging structure having no release paper have been proposed, and specific examples thereof include the following. A sanitary napkin package in which an adhesive layer of a sanitary napkin is directly in contact with a polyolefin-based film (Japanese Utility Model Publication No. 59-9615). A package made of a water-soluble film and individually packaged with a sanitary napkin, using a packaging material having a release layer at a portion in contact with the adhesive layer of the sanitary napkin (Japanese Utility Model Application Laid-Open No. 59-253)
No. 71). The adhesive layer of the sanitary napkin is exposed from the opening end of the pocket portion of the packaging material, and the non-adhesive layer of the packaging material is fixed on the upper surface of the pocket portion by fastening the adhesive layer. 3
No. 4211). An individual sanitary napkin wrapping material (actually opened) is provided with a wrapping material having a peeling treatment portion at a portion in contact with the adhesive portion of the sanitary napkin, sealing four sides of two sheets and providing perforations for opening. 58-179120). A sanitary napkin package comprising a multilayer resin film having a release layer in a portion of the sanitary napkin in contact with the pressure-sensitive adhesive layer (Japanese Utility Model Application Laid-Open No. 63-71025). A napkin packaging material comprising a film made of a resin mainly composed of an olefin polymer and a silicone copolymer (Japanese Utility Model Laid-Open No. 2-35724). Napkin wrapping material with a peeled area coated with silicone and a heat sealable sealing area
No. 11324).

[0004] However, in the above-mentioned package,
There are the following problems. In the above-mentioned package, since the packaging material for packaging the napkin is a single film, the releasability decreases with time, and the packaging material stretches or tears when the napkin is taken out. Further, if the film thickness is increased to suppress this, not only the cost is increased but also the film itself becomes hard and the package cannot be easily opened. In the above-mentioned package, there is a problem that the film strength is low, and the package is stretched or peeled when peeling the packaging material, and when the degree of peeling of the film is increased to solve such a problem, Water solubility is impaired and clogs the toilet bowl when discarded. In the above-mentioned package, since the adhesive layer can be provided only on a part of the napkin, the napkin has poor fixability when used. In the above-mentioned package, a perforation is provided. However, since air easily enters from the perforation and the package swells, it is difficult to carry or open the package. In the above-mentioned package, since the content or copolymer of a releasable substance such as a silicone resin is used as the thermoplastic resin, the releasable substance bleeds out and the degree of release is unstable due to temperature or humidity. It is easy to be in a state. Furthermore, a region where the peeling force is partially reduced occurs on the peeling surface, and in some cases, the film does not peel off. In addition, the bleed-out peelable substance often migrates to the adhesive surface, and it is difficult to maintain daily peel stability in any environment. The above package has the same problem as above, and furthermore, since a film in which a peelable area and a sealable area are set in advance is used, a heat seal layer is provided, and the product is always packaged at a predetermined position. It is inferior in economy and productivity.

[0005] That is, the structure of the above-mentioned package has both the releasability between the adhesive layer provided on the sanitary napkin and the release layer provided on the package, and the tack force of the adhesive layer against shorts. There is a problem that it cannot be satisfied with sufficient practicality.

Accordingly, an object of the present invention is to provide a sanitary napkin having an adhesive layer having a sufficient tacking force to shorts when used, and the adhesive layer and a release layer provided on a packaging material. An object of the present invention is to provide a sanitary napkin packaging structure having excellent peelability.

[0007]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies in order to solve the above-mentioned problems, and as a result, at least an inner surface of a packaging material for wrapping a sanitary napkin provided with a release layer is provided.
It has been found that the above object can be achieved by providing irregularities.

The present invention has been made based on the above findings, and comprises an sanitary napkin and a packaging material for wrapping the sanitary napkin, the adhesive layer provided on the non-skin contact surface of the sanitary napkin, In a sanitary napkin packaging structure in which a release layer provided on the inner surface of the packaging material is detachably adhered, at least the uneven surface is provided on the inner surface of the packaging material on which the release layer is provided. A sanitary napkin packaging structure is provided.

[0009]

The packaging structure of the present invention comprises a pressure-sensitive adhesive layer provided on the non-skin contact surface of the sanitary napkin and a release layer provided on the inner surface of the packaging material, which are removably adhered. And
At the time of opening the packaging structure, since the uneven portion is provided on the inner surface provided with the release layer of the packaging material, the tack force of the adhesive layer is practically sufficient for use of a sanitary napkin. Even if it is a degree, the adhesive layer and the peeling layer can be smoothly peeled.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited thereto.

FIG. 1 is a perspective view showing an embodiment of the sanitary napkin packaging structure of the present invention, FIG. 2 is a bottom view of the sanitary napkin in the packaging structure shown in FIG.
FIG. 2 is a bottom view of the packaging material in the packaging structure shown in FIG. 1. FIG. 4 is a schematic perspective view showing an intermediate configuration when the sanitary napkin is folded into three parts, and FIG. 5 is a schematic perspective view showing a packaging mode of the three-folded sanitary napkin with a packaging material. FIG. 6 is an enlarged perspective view of a part I of the packaging material shown in FIG. FIG. 7 is a schematic perspective view showing a main part of a continuous packaging mode of a sanitary napkin folded in three with a packaging material.

The sanitary napkin packaging structure 1 of this embodiment shown in FIG. 1 comprises a sanitary napkin 10 and a packaging material 20 for wrapping the sanitary napkin, and is provided on the non-skin contact surface 12 of the sanitary napkin 10. The adhesive layer 16 and the release layer 21 provided on the inner surface of the packaging material 20 are detachably adhered. An uneven portion 24 is provided on at least the inner surface of the packaging material 20 where the release layer 21 is provided.

More specifically, in the sanitary napkin packaging structure 1 according to the present embodiment, the sanitary napkin 10 is arranged such that the longitudinal direction of the sanitary napkin 10 is approximately 3 in the front portion 13, the center portion 14, and the rear portion 15. In the two bent portions 17 to be divided, in the order of the rear portion 15 and the front portion 13, the central portion 1
4 is folded into three on the skin contact surface 11 side, and is individually wrapped by the packaging material 20. In the sanitary napkin 10 packaged by the packaging structure of the present invention, the skin contact surface 11 is made of a liquid-permeable sheet material, and the non-skin contact surface 12 is made of a liquid-impermeable sheet material. This is a normal sanitary napkin formed and further having a liquid-retentive absorber between the skin contact surface 11 and the non-skin contact surface 12.

Here, the front part 13 is a part located in the front direction of the user when using the sanitary napkin. Further, the release layer 21 only needs to be provided at least at the corresponding portion of the adhesive layer 16, and may be provided at a portion other than the corresponding portion.

As shown in FIG. 2, the front portion 13 and the central portion 14 of the sanitary napkin 10 have
Each has an adhesive layer 16, as shown in FIG.
A release layer 21 is provided on the inner surface of the packaging material 20 at a position corresponding to the adhesive layer 16.

Each side edge portion 22 of the packaging material 20
Are joined by heat sealing, and the edge portions 23
A perforation 26 for facilitating the opening of the packaging material is provided on the central surface along the center line.

Further, as shown in FIG.
Is the adhesive layer 16 on the inner surface of the packaging material 20.
Is formed in a rectangular shape so as to form a side edge portion 22 for heat-sealing and fixing the package, and edge portions 23 and 23 '.

As shown in FIG. 1, in the sanitary napkin packaging structure 1, the adhesive layer 16 is adhered to the release layer 21.
Is protected. The pressure-sensitive adhesive layer 16 is formed by applying a pressure-sensitive adhesive on the non-skin contact surface 12, or by applying the pressure-sensitive adhesive to a release-treated package film and then transferring it to the non-skin contact surface 12. . As the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer, for example, a pressure-sensitive adhesive containing a styrene-based block polymer, a tackifier, and a softener as main components and maintaining a two-phase block structure of a styrene phase and a rubber phase is used.

Examples of the styrene block polymer include styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-isoprene-styrene block copolymer (SIS), and styrene-butadiene-styrene block copolymer (SBS). ), Styrene-ethylene-propylene-styrene copolymer (SEPS), and the like. These styrenic block polymers preferably have a styrene moiety molecular weight of 7000 to 2
000, the molecular weight of the rubber part is preferably 35,000
~ 70,000 block copolymer.

The tackifier includes a C5 petroleum resin having a softening point of 80 ° C. or higher and a molecular weight of 400 to 2,000, a C9 petroleum resin, a C5 / C9 petroleum resin, α
Examples thereof include a polyterpene resin, a rosin-based resin, or a hydrogenated product thereof, which is a copolymer of pinene, β-pinene, or dipentene. The softener has a softening point of 10 ° C.
A process oil having an average molecular weight of 200 to 700,
Various plasticizers, polybutene, liquid resin and the like can be mentioned.

As the pressure-sensitive adhesive, the following composition A or
B is preferred.

The release layer 21 is formed by applying a release treatment agent on the inner surface of the packaging material 20 or attaching a release tape. Silicone resin, fluorine resin,
Or an octadecyl isocyanate type is preferable. In particular, it is preferable to use a silicone resin-based material as the release material component and apply it by heating and drying, or spray it with a spray to form a thin film. further,
Using a polyolefin or polyester film as the release tape and bonding it to the packaging material by heat or ultrasonic waves, it has appropriate rigidity, easy to open,
In addition, since it has excellent heat resistance, it is advantageous in production.

As the packaging material 20, polypropylene, low-density polyethylene, polyvinyl alcohol, a nonwoven fabric or paper, or a composite material thereof having a thickness of 5 to 50 μm is preferably used. It is preferable to seal in the same direction.

Hereinafter, the characteristic portion of the sanitary napkin packaging structure 1 of this embodiment will be described in more detail.
In the packaging structure of the present invention, as shown in FIG. 3, a fine uneven portion 24 is provided on at least the inner surface of the packaging material 20 where the release layer 21 is provided. The irregularities 24
Has a shape such as a rectangle, a circle, or a line, and preferably has a size such that a human can visually and tactilely perceive it. Specifically, for example, in the case of a circular concave-convex portion, it is preferable that the size of the convex portion is in the range of 0.5 to 5 mm in diameter and the height is in the range of 0.5 to 2 mm.
By providing the irregularities 24, the contact area between the packaging material and the adhesive portion is reduced, so that the peeling becomes easy and the strength of the packaging material can be increased. Furthermore, if only the contact surface of the uneven portion with the adhesive portion is subjected to a peeling treatment, it is economically excellent and advantageous in production. The uneven portion can be easily formed by using a normal embossing method and apparatus.

Further, in the sanitary napkin packaging structure of the present invention, as shown in FIG. 6, fine irregularities 25 which are finer than the irregularities 24 are further provided on the surface of the irregularities 24. The fine unevenness 25 has a shape such as a rectangle, a circle, or a line, and the size thereof is preferably such that a human cannot visually perceive it. Specifically, for example, in the case of a circular fine unevenness, the size of the protrusion is set in a range of 10 to 500 μm in diameter, and the height is set to 10 to 50 μm.
It is preferred to be in the range of μm. By providing the fine irregularities, the peelability of the packaging material 20 can be further improved.

The fine unevenness can be formed by the same method and apparatus as the above unevenness. The order in which the unevenness and the fine unevenness are formed is as follows. After the provision, the uneven portions may be provided, or both the uneven portions may be provided at the same time. In addition, the fine unevenness is usually provided on the entire surface of the unevenness, but may be provided only on the surface of the protrusion of the unevenness.

In this embodiment, the adhesive layer is
Although an example in which one part is provided in each of the front part and the rear part has been described, the present invention is not limited to this. For example, the number and shape of the adhesive layers are not particularly limited, and two places are provided. The above can also be applied. In addition, the release layer is not limited to the above-described embodiment, and may be provided only on a portion corresponding to the adhesive layer. Furthermore, the form of the sanitary napkin can be a winged type.

When the sanitary napkin is used, the perforation 26 shown in FIG. 1 is pulled, the packaging material 20 is opened, and the release layer 21 of the packaging material 20 is placed on the sanitary napkin 10.
It can be used immediately by peeling it off from the adhesive layer 16.

Next, a method for forming the sanitary napkin packaging structure 1 of this embodiment will be described. First, the sanitary napkin 10 shown in FIG. 2 is placed on the center part 14 in the order of the rear part 15 and the front part 13 in each of the bent parts 17 so that the front part 13 is on the outside as shown in FIG. Is folded into three on the side of the skin contact part 11. Next, as shown in FIG. 5, the sanitary napkin 10 folded in three is placed on the release layer 21 of the packaging material, and the edge portions 23 and 23 'are turned up. The sanitary napkin 10 is folded in the direction of arrow A, and the side edge portions 22 are heat-sealed to form the sanitary napkin packaging structure 1. Incidentally, industrially, as shown in FIG. 7, usually, the sanitary napkin 10 folded into three is continuously formed on each release layer 21 of the continuous sheet of the packaging material 20 provided with the release layers 21 at predetermined intervals. And put the sanitary napkin on the packaging material 2
After being continuously wrapped from both sides by 0, cutting is performed at the cutting line 27 and heat sealing is performed at the same time to continuously form the sanitary napkin packaging structure of the present invention.

[0030]

According to the present invention, the sanitary napkin is provided with an adhesive layer having a sufficient tack force to the shorts during use thereof, and the sanitary napkin is provided between the adhesive layer and the release layer provided on the packaging material. A sanitary napkin packaging structure having excellent releasability is provided, and specifically, the following effects are obtained. The packaging material does not stretch or tear, the bag is flexible, so the sound generated when peeling is small, the packaging material does not shrink due to heat, the packaging material is easy to peel off from the adhesive layer, peeling when using a sanitary napkin There is no need to remove the paper, and there is no need to dispose of the release paper.Therefore, there is no need to dispose of the release paper in the toilet bowl so that it can be clogged. Can be

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a packaging structure of the present invention.

FIG. 2 is a bottom view of the sanitary napkin in the packaging structure shown in FIG.

FIG. 3 is a bottom view of a packaging material in the packaging structure shown in FIG.

FIG. 4 is a schematic perspective view showing an intermediate configuration when the sanitary napkin is folded into three.

FIG. 5 is a schematic perspective view showing a packaging mode of a sanitary napkin folded in three by a packaging material.

FIG. 6 is a partially enlarged cross-sectional view taken along the line II ′ of the packaging material shown in FIG. 3;

FIG. 7 is a schematic perspective view showing a main part of a continuous packaging mode of a sanitary napkin folded in three by a packaging material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sanitary napkin packaging structure 10 Sanitary napkin 11 Skin contact surface 12 Non-skin contact surface 13 Front part 14 Central part 15 Rear part 16 Adhesive layer 17 Bent part 20 Packaging material 21 Peeling layer 22 Side edge part 23 Edge End part 24 Uneven part 25 Fine uneven part

Claims (3)

(57) [Scope of request for utility model registration] 1. A sanitary napkin and a packaging material for packaging the same, wherein an adhesive layer provided on a non-skin contact surface of the sanitary napkin and a release layer provided on an inner surface of the packaging material. ,
A sanitary napkin packaging structure detachably adhered, comprising: a sanitary napkin packaging structure, wherein at least an inner surface provided with a release layer of the packaging material is provided with an uneven portion. 2. The sanitary napkin packaging structure according to claim 1, wherein fine irregularities finer than the irregularities are provided on the surface of the irregularities. 3. The sanitary napkin packaging structure according to claim 1, wherein at least a surface of the uneven portion that comes into contact with the adhesive layer is subjected to a peeling treatment.