JP2598184Y2 - 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 when using it.Therefore, the disposal of the release paper is troublesome, and when the napkin is discarded 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, Japanese Utility Model Laid-Open No. 4-90320). 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. 34211
No.). 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 (Japanese Utility Model Application Laid-Open No. 63-71025) using a multilayer resin film having a release layer in a portion of the sanitary napkin in contact with the pressure-sensitive adhesive layer. Wrapping material for napkins consisting of a film made of a resin mainly composed of an olefin polymer and a silicone copolymer
-35724). A napkin wrapping material having a peeled area coated with silicone and a heat sealable sealing area (Japanese Utility Model Application Laid-Open No. 4-1324).

[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 material or copolymer containing a peelable substance such as a silicone resin is used as the thermoplastic resin, the peeled substance bleeds out and the peeling degree is unstable due to temperature or humidity. It is easy to be in a state. Further, 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 release material often migrates to the adhesive surface, and it is difficult to maintain daily release stability in any environment. In the above-mentioned package, there is a problem similar to the above,
Furthermore, since a film in which a peelable area and a sealable area are set in advance is used, it is necessary to provide a heat seal layer and always package the product at a fixed position, which 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, and that economic efficiency and productivity are poor.

Accordingly, an object of the present invention is to provide a sanitary napkin packaging structure which is excellent in peelability between the pressure-sensitive adhesive layer and the packaging material, and is also excellent in economy and productivity.

[0007]

Means for Solving the Problems The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, have achieved the above object by forming a packaging material for wrapping a sanitary napkin with a release sheet. I learned that

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, and said packaging material, in the packaging structure for the sanitary napkin made by detachably adhesive, the packaging material, of which
Whole surface consists release sheet having a release property, the pair
Is sealed with an adhesive, pressure bonding or heat , and the adhesive is more viscous than the adhesive used for the adhesive layer.
It has high adhesion and remains on the packaging after opening.
The crimping is performed intermittently, and the heat
The heating temperature in the case of peeling
An object of the present invention is to provide a sanitary napkin packaging structure having a temperature equal to or higher than the melting point of a release agent .

[0009]

According to the sanitary napkin packaging structure of the present invention, a sanitary napkin having a non-skin contact surface provided with an adhesive layer is bent so that the non-skin contact surface is exposed, and the napkin is wrapped with a packaging material. Do it. In the packaging structure, since the packaging material is formed of a release sheet, the adhesive layer provided on the non-skin contact surface of the sanitary napkin can be protected without providing a release paper.

[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 a schematic perspective view showing a main part of a continuous packaging mode of the sanitary napkin with the packaging material folded in three.

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 10, and is provided on the non-skin contact surface 12 of the sanitary napkin 10. The provided adhesive layer 16 and the packaging material 20 are detachably adhered. And the packaging material 20 is
It is made of a release sheet, and its sides are sealed.

More specifically, in the sanitary napkin packaging structure 1, the longitudinal direction of the sanitary napkin 10 is divided into approximately three equal parts by dividing the longitudinal direction of the sanitary napkin 10 into a front part 13, a central part 14 and a rear part 15. In the two bent portions 17 to be formed, the rear portion 15 and the front portion 13 are folded in three on the skin contact surface 11 side of the central portion 14 in this order, and 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. As shown in FIG. 2, an adhesive layer 16 is provided on each of the front portion 13 and the central portion 14 of the sanitary napkin 10, and the adhesive layer 16 is
0 is adhered and protected on the inner surface. Further, a perforation 24 is provided on the central surface along the edge portion 23 to facilitate opening of the packaging material.

The pressure-sensitive adhesive layer 16 is formed by applying a pressure-sensitive adhesive on the non-skin contact surface 12 or by peeling the packaging material 2.
0, and then transferred onto the non-skin contact surface 12 or the like. 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-based 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.

Hereinafter, the characteristic portion of the sanitary napkin packaging structure 1 of the present embodiment will be described in more detail.
The wrapping material 20 is made of a release sheet, and the entire inner surface thereof has release properties. The release sheet has a thickness of 5 to 50 μm.
And a packaging material such as polypropylene, low-density polyethylene, polyvinyl alcohol, or a nonwoven fabric or paper, or a composite material thereof, and the entire inner surface thereof is subjected to a release treatment.

In the present invention, the above-mentioned peeling treatment can be carried out by applying a peeling treatment agent on the entire inner surface or by sticking a peeling tape. The release agent or the release material component of the release tape is preferably a silicone resin type, a fluorine resin type, or an octadecyl isocyanate type. In particular, as the release treatment, it is preferable to use a silicone resin-based release component and apply and heat dry or spray a spray to form a thin film. Furthermore, a thin polyolefin film or polyester film that has been peeled off and bonded to the above packaging material by heat or ultrasonic waves has moderate rigidity, is easy to open, and has excellent heat resistance. It is more advantageous.

Further, as shown in FIG. 3, this embodiment Odor
In addition, the above-mentioned wrapping material may be
The edges are sealed. Specifically, the adhesive
In the case of the wrapping, each side edge portion 22 of the packaging material 20 has
An adhesive has been applied, which allows the packaging material 20
Is formed in a bag shape by sealing each side thereof. The adhesive described above, the adhesive layer higher adhesive strength than the adhesive used in 16, which adhesive after opening remains on the packaging material,
For example, a rubber-based adhesive such as natural rubber or butadiene rubber, or an acrylic-based, urethane-based, or silicon-based adhesive may be used. Further, in the case of sealing by heat, the release sheet as described above, since generally sealed by heat is difficult, the need to seal the above thermal melting point of the release agent
There, depending on the degree of thickness of the layer formed by the exfoliation process can be sealed using, for example, hot roll. As for the seal, as in this embodiment,
It is preferable to seal with an adhesive or to seal by mechanical crimping as described later.

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 form of the sanitary napkin may be a napkin. Further, in the present embodiment, the case where each side edge portion 22 of the packaging material 20 is sealed is described. However, as long as at least one side of the packaging material is sealed, there is no particular limitation. An adhesive may be applied to the edge portion 23 as well as the edge portion 23 to seal it. Further, only one of the side edge portions 22 may be sealed.

When the sanitary napkin is used, the perforation 24 shown in FIG. 1 is pulled, the packaging material 20 is opened, and the packaging material 20 is attached to the adhesive layer 16 of the sanitary napkin 10.
It can be used immediately by peeling it off.

Next, a method for forming the sanitary napkin packaging structure 1 of this embodiment will be described. First, as shown in FIG. 4, the sanitary napkin 10 shown in FIG.
At each bent portion 17 so that
The rear part 15 and the front part 13 are folded in three in the order of the skin contact part 11 side of the central part 14. Next, as shown in FIG.
The folded sanitary napkin 10 is placed on the packaging material 20 on which the adhesive is applied to each side edge portion 22 and peeled, and the edge portions 23 and 23 ′ are attached to the edge portion 23. Bend in the direction of arrow A so that it is on top, and sanitary napkin 1
After packaging 0, the sealing structure 1 for each sanitary napkin can be formed by sealing the side edge portions 22. Incidentally, industrially, as shown in FIG. 6, usually, on a continuous sheet of the packaging material 20 provided with the release layer 21 at a predetermined interval,
The sanitary napkin 10 folded in three is placed continuously, the sanitary napkin is continuously wrapped from both sides by the packaging material 20, and then cut and sealed at the cutting line 25 simultaneously with the sanitary napkin of the present invention. Napkin packaging structure is formed continuously.

Next, another embodiment of the present invention will be described. FIG. 7 is a perspective view showing another embodiment of the sanitary napkin packaging structure of the present invention. The sanitary napkin packaging structure 1 of the present embodiment shown in FIG. 7 is composed of a sanitary napkin 10 and a packaging material 20 for wrapping the sanitary napkin 10, and the adhesive provided on the non-skin contact surface 12 of the sanitary napkin 10. The layer 16 and the packaging material 20 are detachably adhered to each other,
The packaging material is made of a release sheet. In the packaging structure 1 of the present embodiment, the packaging material 20 is formed in a bag shape by sealing a side edge portion by crimping. This crimping is performed as shown in FIG.
As shown in FIG.

[0026]

According to the present invention, the sanitary napkin has an adhesive layer having a sufficient tack force to shorts when used, and has excellent peelability between the adhesive layer and the packaging material. Provides a sanitary napkin packaging structure which is excellent in economy and productivity, and specifically has the following effects. The packaging material does not stretch or tear,
The sound generated when the bag is peeled off is small, the packaging material does not shrink due to heat, the packaging material is easily peeled off from the adhesive layer, there is no need to peel off the release paper when using a sanitary napkin, and there is no need to dispose of the release paper Therefore, it is not discarded and clogged in the toilet, and the adhesive layer of the sanitary napkin can be made large enough to have a sufficient fixing force to the shorts.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a 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. 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 schematic perspective view showing a main part of a continuous packaging mode of a sanitary napkin folded in three by a packaging material.

FIG. 7 is a perspective view showing another embodiment of the sanitary napkin packaging structure of the present invention.

[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 Back part 16 Adhesive layer 17 Folding part 20 Packaging material 22 Side edge part 23 Edge part

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A61F 13/15

Claims (3)

(57) [Scope of request for utility model registration] 1. A sanitary napkin and a packaging material for packaging the sanitary napkin, wherein an adhesive layer provided on a non-skin contact surface of the sanitary napkin and the packaging material are removably adhered. In the packaging structure for a sanitary napkin, the packaging material is formed of a release sheet having a releasable entire inner surface, and a pair of side edges thereof is bonded with an adhesive, pressure bonding or heat.
The adhesive is more adhesive than the adhesive used for the adhesive layer.
High, is intended to remain on the packaging material after opening, it said crimping is intermittently carried out, the heating temperature in the case of sealing by the heat, the release Sea
A sanitary napkin packaging structure having a temperature equal to or higher than the melting point of the release agent used for the napkin. 2. The method according to claim 1, wherein the adhesive is rubber-based, acrylic-based,
Claims: It is a urethane-based or silicon-based
A packaging structure for the sanitary napkin according to claim 1. Wherein said packaging material, packaging structure of the sanitary napkin according to claim 1 or 2 characterized in that it consists of paper.